If,. Using the Euclidean algorithm, we have, somust divide. The greatest integerfor whichdividesis; we can double-check manually and we find that indeed.

Solution 2 (Simple)

Let, then. ThenTherefore,must be divisible by, which is largest whenand

Solution 3

In a similar manner, we can apply synthetic division. We are looking for

. Again,must be a factor of.

Solution 4

The key to this problem is to realize thatfor all. Since we are asked to find the maximum possiblesuch that, we have:. This is because of the property that states that ifand, then. Since, the largest factor of 900 is itself we have:

~qwertysri987

Solution 5 (Easy Modular Arithmetic)

Notice that. Therefore

~asops

See also

The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions.

45. There are two circles C1 with radius r1, central coordinate (x1, y1) and C2 with radius r2 and central coordinate (x2, y2). Go to the editor

Write a Python program to test the followings -

• "C2 is in C1" if C2 is in C1
• "C1 is in C2" if C1 is in C2
• "Circumference of C1 and C2 intersect" if circumference of C1 and C2 intersect
• "C1 and C2 do not overlap" if C1 and C2 do not overlap and
• "Circumference of C1 and C2 will touch" if C1 and C2 touch

Input:
Input numbers (real numbers) are separated by a space.
Input x1, y1, r1, x2, y2, r2:
5 4 2 3 9 2
C1 and C2 do not overlap
Input x1, y1, r1, x2, y2, r2:
5 4 3 5 10 3
Circumference of C1 and C2 will touch
Input x1, y1, r1, x2, y2, r2:
6 4 3 10 4 2
Circumference of C1 and C2 intersect
Input x1, y1, r1, x2, y2, r2:
5 4 3 5 4 2
C2 is in C1
Input x1, y1, r1, x2, y2, r2:
5 4 2 5 4 3
C1 is in C2
Click me to see the sample solution

46. Write a Python program to that reads a date (from 2016/1/1 to 2016/12/31) and prints the day of the date. Jan. 1, 2016, is Friday. Note that 2016 is a leap year. Go to the editor
Input:
Two integers m and d separated by a single space in a line, m ,d represent the month and the day.
Input month and date (separated by a single space):
5 15
Name of the date: Sunday
Click me to see the sample solution

47. Write a Python program which reads a text (only alphabetical characters and spaces.) and prints two words. The first one is the word which is arise most frequently in the text. The second one is the word which has the maximum number of letters. Go to the editor

Note: A word is a sequence of letters which is separated by the spaces.

Input:
A text is given in a line with following condition:
a. The number of letters in the text is less than or equal to 1000.
b. The number of letters in a word is less than or equal to 32.
c. There is only one word which is arise most frequently in given text.
d. There is only one word which has the maximum number of letters in given text.
Input text: Thank you for your comment and your participation.
Output: your participation.
Click me to see the sample solution

48. Write a Python program that reads n digits (given) chosen from 0 to 9 and prints the number of combinations where the sum of the digits equals to another given number (s). Do not use the same digits in a combination. Go to the editor
Input:
Two integers as number of combinations and their sum by a single space in a line. Input 0 0 to exit.
Input number of combinations and sum, input 0 0 to exit:
5 6
2 4
0 0
2
Click me to see the sample solution

49. Write a Python program which reads the two adjoined sides and the diagonal of a parallelogram and check whether the parallelogram is a rectangle or a rhombus. Go to the editor
According to Wikipedia-
parallelograms: In Euclidean geometry, a parallelogram is a simple (non-self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure.
rectangles: In Euclidean plane geometry, a rectangle is a quadrilateral with four right angles. It can also be defined as an equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°). It can also be defined as a parallelogram containing a right angle.
rhombus: In plane Euclidean geometry, a rhombus (plural rhombi or rhombuses) is a simple (non-self-intersecting) quadrilateral whose four sides all have the same length. Another name is equilateral quadrilateral, since equilateral means that all of its sides are equal in length. The rhombus is often called a diamond, after the diamonds suit in playing cards which resembles the projection of an octahedral diamond, or a lozenge, though the former sometimes refers specifically to a rhombus with a 60° angle, and the latter sometimes refers specifically to a rhombus with a 45° angle.
Input:
Two adjoined sides and the diagonal.
1 <= ai, bi, ci <= 1000, ai + bi > ci
Input two adjoined sides and the diagonal of a parallelogram (comma separated):
3,4,5
This is a rectangle.
Click me to see the sample solution

50. Write a Python program to replace a string "Python" with "Java" and "Java" with "Python" in a given string. Go to the editor
Input:
English letters (including single byte alphanumeric characters, blanks, symbols) are given on one line. The length of the input character string is 1000 or less.
Input a text with two words 'Python' and 'Java'
Python is popular than Java
Java is popular than Python
Click me to see the sample solution

51. Write a Python program to find the difference between the largest integer and the smallest integer which are created by 8 numbers from 0 to 9. The number that can be rearranged shall start with 0 as in 00135668. Go to the editor
Input:
Input an integer created by 8 numbers from 0 to 9.:
2345
Difference between the largest and the smallest integer from the given integer:
3087
Click me to see the sample solution

52. Write a Python program to compute the sum of first n given prime numbers. Go to the editor
Input:
n ( n <= 10000). Input 0 to exit the program.
Input a number (n<=10000) to compute the sum:(0 to exit)
25
Sum of first 25 prime numbers:
1060
Click me to see the sample solution

53. Write a Python program that accept an even number (>=4, Goldbach number) from the user and create a combinations that express the given number as a sum of two prime numbers. Print the number of combinations. Go to the editor
Goldbach number: A Goldbach number is a positive even integer that can be expressed as the sum of two odd primes.[4] Since four is the only even number greater than two that requires the even prime 2 in order to be written as the sum of two primes, another form of the statement of Goldbach's conjecture is that all even integers greater than 4 are Goldbach numbers.
The expression of a given even number as a sum of two primes is called a Goldbach partition of that number. The following are examples of Goldbach partitions for some even numbers:
6 = 3 + 3
8 = 3 + 5
10 = 3 + 7 = 5 + 5
12 = 7 + 5
...
100 = 3 + 97 = 11 + 89 = 17 + 83 = 29 + 71 = 41 + 59 = 47 + 53
Input an even number (0 to exit):
100
Number of combinations:
6
Click me to see the sample solution

54. if you draw a straight line on a plane, the plane is divided into two regions. For example, if you pull two straight lines in parallel, you get three areas, and if you draw vertically one to the other you get 4 areas.
Write a Python program to create maximum number of regions obtained by drawing n given straight lines. Go to the editor
Input:
(1 <= n <= 10,000)
Input number of straight lines (o to exit):
5
Number of regions:
16
Click me to see the sample solution

55. There are four different points on a plane, P(xp,yp), Q(xq, yq), R(xr, yr) and S(xs, ys). Write a Python program to test AB and CD are orthogonal or not. Go to the editor
Input:
xp,yp, xq, yq, xr, yr, xs and ys are -100 to 100 respectively and each value can be up to 5 digits after the decimal point It is given as a real number including the number of. Output:
Output AB and CD are not orthogonal! or AB and CD are orthogonal!.
Click me to see the sample solution

56. Write a Python program to sum of all numerical values (positive integers) embedded in a sentence. Go to the editor
Input:
Sentences with positive integers are given over multiple lines. Each line is a character string containing one-byte alphanumeric characters, symbols, spaces, or an empty line. However the input is 80 characters or less per line and the sum is 10,000 or less.
Input some text and numeric values (to exit):
Sum of the numeric values: 80
None
Input some text and numeric values (to exit):
Sum of the numeric values: 17
None
Input some text and numeric values (to exit):
Sum of the numeric values: 10
None
Click me to see the sample solution

57. There are 10 vertical and horizontal squares on a plane. Each square is painted blue and green. Blue represents the sea, and green represents the land. When two green squares are in contact with the top and bottom, or right and left, they are said to be ground. The area created by only one green square is called "island". For example, there are five islands in the figure below.
Write a Python program to read the mass data and find the number of islands. Go to the editor
Input:
Input 10 rows of 10 numbers representing green squares (island) as 1 and blue squares (sea) as zeros
1100000111
1000000111
0000000111
0010001000
0000011100
0000111110
0001111111
1000111110
1100011100
1110001000
Number of islands:
5
Click me to see the sample solution

58. When character are consecutive in a string , it is possible to shorten the character string by replacing the character with a certain rule. For example, in the case of the character string YYYYY, if it is expressed as # 5 Y, it is compressed by one character.
Write a Python program to restore the original string by entering the compressed string with this rule. However, the # character does not appear in the restored character string. Go to the editor
Input:
The restored character string for each character on one line.
Original text: XY#6Z1#4023
XYZZZZZZ1000023
Original text: #39+1=1#30
999+1=1000
Click me to see the sample solution

59. A convex polygon is a simple polygon in which no line segment between two points on the boundary ever goes outside the polygon. Equivalently, it is a simple polygon whose interior is a convex set. In a convex polygon, all interior angles are less than or equal to 180 degrees, while in a strictly convex polygon all interior angles are strictly less than 180 degrees.
Write a Python program that compute the area of the polygon . The vertices have the names vertex 1, vertex 2, vertex 3, ... vertex n according to the order of edge connections Go to the editor
Note: The original sentences are uppercase letters, lowercase letters, numbers, symbols, less than 100 letters, and consecutive letters are not more than 9 letters.
Input:
Input number of sides: 5
Side: 1
Input the Coordinate:
Input Coordinate x: 1
Input Coordinate y: 0
Side: 2
Input the Coordinate:
Input Coordinate x: 0
Input Coordinate y: 0
Side: 3
Input the Coordinate:
Input Coordinate x: 1
Input Coordinate y: 1
Side: 4
Input the Coordinate:
Input Coordinate x: 2
Input Coordinate y: 0
Side: 5
Input the Coordinate:
Input Coordinate x: -1
Input Coordinate y: 1
Area of the Polygon: 0.5
Click me to see the sample solution

60. Internet search engine giant, such as Google accepts web pages around the world and classify them, creating a huge database. The search engines also analyze the search keywords entered by the user and create inquiries for database search. In both cases, complicated processing is carried out in order to realize efficient retrieval, but basics are all cutting out words from sentences.
Write a Python program to cut out words of 3 to 6 characters length from a given sentence not more than 1024 characters. Go to the editor
Input:
English sentences consisting of delimiters and alphanumeric characters are given on one line.
Input a sentence (1024 characters. max.)
The quick brown fox
3 to 6 characters length of words:
The quick brown fox
Click me to see the sample solution

61. Arrange integers (0 to 99) as narrow hilltop, as illustrated in Figure 1. Reading such data representing huge, when starting from the top and proceeding according to the next rule to the bottom. Write a Python program that compute the maximum value of the sum of the passing integers. Go to the editor
Input:
A series of integers separated by commas are given in diamonds. No spaces are included in each line. The input example corresponds to Figure 1. The number of lines of data is less than 100 lines.
Output:
The maximum value of the sum of integers passing according to the rule on one line.
Input the numbers (ctrl+d to exit):
8
4, 9
9, 2, 1
3, 8, 5, 5
5, 6, 3, 7, 6
3, 8, 5, 5
9, 2, 1
4, 9
8
Maximum value of the sum of integers passing according to the rule on one line.
64
Click me to see the sample solution

62. Write a Python program to find the number of combinations that satisfy p + q + r + s = n where n is a given number <= 4000 and p, q, r, s in the range of 0 to 1000. Go to the editor
Input a positive integer: (ctrl+d to exit)
252
Number of combinations of a,b,c,d: 2731135
Click me to see the sample solution

63. Write a Python program which adds up columns and rows of given table as shown in the specified figure. Go to the editor
Input number of rows/columns (0 to exit)
4
Input cell value:
25 69 51 26
68 35 29 54
54 57 45 63
61 68 47 59
Result:
25 69 51 26 171
68 35 29 54 186
54 57 45 63 219
61 68 47 59 235
208 229 172 202 811
Input number of rows/columns (0 to exit)
Click me to see the sample solution

64. Given a list of numbers and a number k, write a Python program to check whether the sum of any two numbers from the list is equal to k or not. Go to the editor
For example, given [1, 5, 11, 5] and k = 16, return true since 11 + 5 is 16.
Sample Input:
([12, 5, 0, 5], 10)
([20, 20, 4, 5], 40)
([1, -1], 0)
([1, 1, 0], 0)
Sample Output:
True
True
True
False
Click me to see the sample solution

65. In mathematics, a subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements. For example, the sequence (A,B,D) is a subsequence of (A,B,C,D,E,F) obtained after removal of elements C, E, and F. The relation of one sequence being the subsequence of another is a preorder.
The subsequence should not be confused with substring (A,B,C,D) which can be derived from the above string (A,B,C,D,E,F) by deleting substring (E,F). The substring is a refinement of the subsequence.
The list of all subsequences for the word "apple" would be "a", "ap", "al", "ae", "app", "apl", "ape", "ale", "appl", "appe", "aple", "apple", "p", "pp", "pl", "pe", "ppl", "ppe", "ple", "pple", "l", "le", "e", "".
Write a Python program to find the longest word in set of words which is a subsequence of a given string. Go to the editor
Sample Input:
("Green", {"Gn", "Gren", "ree", "en"})
("pythonexercises", {"py", "ex", "exercises"})
Sample Output:
Gren
exercises
Click me to see the sample solution

66. From Wikipedia, the free encyclopaedia:
A happy number is defined by the following process:
Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers.
Write a Python program to check whether a number is "happy" or not. Go to the editor
Sample Input:
(7)
(932)
(6)
Sample Output:
True
True
False
Click me to see the sample solution

67. From Wikipedia,
A happy number is defined by the following process:
Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers.
Write a Python program to find and print the first 10 happy numbers. Go to the editor
Sample Input:
[:10]
Sample Output:
[1, 7, 10, 13, 19, 23, 28, 31, 32, 44]
Click me to see the sample solution

68. Write a Python program to count the number of prime numbers less than a given non-negative number. Go to the editor
Sample Input:
(10)
(100)
Sample Output:
4
25
Click me to see the sample solution

69. In abstract algebra, a group isomorphism is a function between two groups that sets up a one-to-one correspondence between the elements of the groups in a way that respects the given group operations. If there exists an isomorphism between two groups, then the groups are called isomorphic.
Two strings are isomorphic if the characters in string A can be replaced to get string B
Given "foo", "bar", return false.
Given "paper", "title", return true.
Write a Python program to check if two given strings are isomorphic to each other or not. Go to the editor
Sample Input:
("foo", "bar")
("bar", "foo")
("paper", "title")
("title", "paper")
("apple", "orange")
("aa", "ab")
("ab", "aa")
Sample Output:
False
False
True
True
False
False
False
Click me to see the sample solution

70. Write a Python program to find the longest common prefix string amongst a given array of strings. Return false If there is no common prefix.
For Example, longest common prefix of "abcdefgh" and "abcefgh" is "abc". Go to the editor
Sample Input:
["abcdefgh","abcefgh"]
["w3r","w3resource"]
["Python","PHP", "Perl"]
["Python","PHP", "Java"]
Sample Output:
abc
w3r
P
Click me to see the sample solution

71. Write a Python program to reverse only the vowels of a given string. Go to the editor
Sample Input:
("w3resource")
("Python")
("Perl")
("USA")
Sample Output:
w3resuorce
Python
Perl
ASU
Click me to see the sample solution

72. Write a Python program to check whether a given integer is a palindrome or not. Go to the editor
Note: An integer is a palindrome when it reads the same backward as forward. Negative numbers are not palindromic.
Sample Input:
(100)
(252)
(-838)
Sample Output:
False
True
False
Click me to see the sample solution

73. Write a Python program to remove the duplicate elements of a given array of numbers such that each element appear only once and return the new length of the given array. Go to the editor
Sample Input:
[0,0,1,1,2,2,3,3,4,4,4]
[1, 2, 2, 3, 4, 4]
Sample Output:
5
4
Click me to see the sample solution

74. Write a Python program to calculate the maximum profit from selling and buying values of stock. An array of numbers represent the stock prices in chronological order. Go to the editor
For example, given [8, 10, 7, 5, 7, 15], the function will return 10, since the buying value of the stock is 5 dollars and sell value is 15 dollars.
Sample Input:
([8, 10, 7, 5, 7, 15])
([1, 2, 8, 1])
([])
Sample Output:
10
7
0
Click me to see the sample solution

75. Write a Python program to remove all instances of a given value from a given array of integers and find the length of the new array. Go to the editor
Sample Input:
([1, 2, 3, 4, 5, 6, 7, 5], 5)
([10,10,10,10,10], 10)
([10,10,10,10,10], 20)
([], 1)
Sample Output:
6
0
5
0
Click me to see the sample solution

76. Write a Python program to find the starting and ending position of a given value in a given array of integers, sorted in ascending order. Go to the editor
If the target is not found in the array, return [0, 0].
Input: [5, 7, 7, 8, 8, 8] target value = 8
Output: [0, 5]
Input: [1, 3, 6, 9, 13, 14] target value = 4
Output: [0, 0]
Click me to see the sample solution

77. The price of a given stock on each day is stored in an array.
Write a Python program to find the maximum profit in one transaction i.e., buy one and sell one share of the stock from the given price value of the said array. You cannot sell a stock before you buy one. Go to the editor
Input (Stock price of each day): [224, 236, 247, 258, 259, 225]
Output: 35
Explanation:
236 - 224 = 12
247 - 224 = 23
258 - 224 = 34
259 - 224 = 35
225 - 224 = 1
247 - 236 = 11
258 - 236 = 22
259 - 236 = 23
225 - 236 = -11
258 - 247 = 11
259 - 247 = 12
225 - 247 = -22
259 - 258 = 1
225 - 258 = -33
225 - 259 = -34
Click me to see the sample solution

78. Write a Python program to print a given N by M matrix of numbers line by line in forward > backwards > forward >... order. Go to the editor
Input matrix:
[[1, 2, 3,4],
[5, 6, 7, 8],
[0, 6, 2, 8],
[2, 3, 0, 2]]
Output:
1
2
3
4
8
7
6
5
0
6
2
8
2
0
3
2
Click me to see the sample solution

79. Write a Python program to compute the largest product of three integers from a given list of integers. Go to the editor
Sample Input:
[-10, -20, 20, 1]
[-1, -1, 4, 2, 1]
[1, 2, 3, 4, 5, 6]
Sample Output:

4000
8
120

Click me to see the sample solution

80. Write a Python program to find the first missing positive integer that does not exist in a given list. Go to the editor
Sample Input:
[2, 3, 7, 6, 8, -1, -10, 15, 16]
[1, 2, 4, -7, 6, 8, 1, -10, 15]
[1, 2, 3, 4, 5, 6, 7]
[-2, -3, -1, 1, 2, 3]
Sample Output:

4
3
8
4

Click me to see the sample solution

81. Write a Python program to randomly generate a list with 10 even numbers between 1 and 100 inclusive. Go to the editor
Note: Use random.sample() to generate a list of random values.
Sample Input:
(1,100)
Sample Output:

[4, 22, 8, 20, 24, 12, 30, 98, 28, 48]

Click me to see the sample solution

82. Write a Python program to calculate the median from a list of numbers. Go to the editor
Sample Input:
[1,2,3,4,5]
[1,2,3,4,5,6]
[6,1,2,4,5,3]
[1.0,2.11,3.3,4.2,5.22,6.55]
[1.0,2.11,3.3,4.2,5.22]
[2.0,12.11,22.3,24.12,55.22]
Sample Output:
3
3.5
3.5
3.75
3.3
22.3
Click me to see the sample solution

83. Write a Python program to test whether a given number is symmetrical or not. Go to the editor
A number is symmetrical when it is equal of its reverse.
Sample Input:
(121)
(0)
(122)
(990099)
Sample Output:
True
True
False
True
Click me to see the sample solution

84. Write a Python program that accepts a list of numbers. Count the negative numbers and compute the sum of the positive numbers of the said list. Return these values through a list. Go to the editor
Original list: [1, 2, 3, 4, 5]
Number of negative of numbers and sum of the positive numbers of the said list: [0, 15]
Original list: [-1, -2, -3, -4, -5]
[5, 0]
Number of negative of numbers and sum of the positive numbers of the said list: [5, 0]
Original list: [1, 2, 3, -4, -5]
[2, 6]
Number of negative of numbers and sum of the positive numbers of the said list: [2, 6]
Original list: [1, 2, -3, -4, -5]
[3, 3]
Number of negative of numbers and sum of the positive numbers of the said list: [3, 3]
Click me to see the sample solution

85. From Wikipedia:
An isogram (also known as a "nonpattern word") is a logological term for a word or phrase without a repeating letter. It is also used by some people to mean a word or phrase in which each letter appears the same number of times, not necessarily just once. Conveniently, the word itself is an isogram in both senses of the word, making it autological.
Write a Python program to check whether a given string is an "isogram" or not. Go to the editor
Sample Input:
("w3resource")
("w3r")
("Python")
("Java")
Sample Output:
False
True
True
False
Click me to see the sample solution

86. Write a Python program to count the number of equal numbers from three given integers. Go to the editor
Sample Input:
(1, 1, 1)
(1, 2, 2)
(-1, -2, -3)
(-1, -1, -1)
Sample Output:
3
2
0
3
Click me to see the sample solution

87. Write a Python program to check whether a given employee code is exactly 8 digits or 12 digits. Return True if the employee code is valid and False if it's not. Go to the editor
Sample Input:
('12345678')
('1234567j')
('12345678j')
('123456789123')
('123456abcdef')
Sample Output:
True
False
False
True
False
Click me to see the sample solution

88. Write a Python program that accept two strings and test if the letters in the second string are present in the first string. Go to the editor
Sample Input:
["python", "ypth"]
["python", "ypths"]
["python", "ypthon"]
["123456", "01234"]
["123456", "1234"]
Sample Output:
True
False
True
False
True
Click me to see the sample solution

89. Write a Python program to compute the sum of the three lowest positive numbers from a given list of numbers. Go to the editor
Original list of numbers: [10, 20, 30, 40, 50, 60, 7]
Sum of the three lowest positive numbers of the said array: 37
Original list of numbers: [1, 2, 3, 4, 5]
Sum of the three lowest positive numbers of the said array: 6
Original list of numbers: [0, 1, 2, 3, 4, 5]
Sum of the three lowest positive numbers of the said array: 6
Click me to see the sample solution

90. Write a Python program to replace all but the last five characters of a given string with "*" and returns the new string. Go to the editor
Original String: kdi39323swe
new string: ******23swe
Original String: 12345abcdef
new string: ******bcdef
Original String: 12345
new string: 12345
Click me to see the sample solution

91. Write a Python program to count the number of arguments in a given function. Go to the editor
Sample Input:
()
(1)
(1, 2)
(1, 2, 3)
(1, 2, 3, 4)
[1, 2, 3, 4]
Sample Output:
0
1
2
3
4
1
Click me to see the sample solution

92. Write a Python program to compute cumulative sum of numbers of a given list. Go to the editor
Note: Cumulative sum = sum of itself + all previous numbers in the said list.
Sample Input:
[10, 20, 30, 40, 50, 60, 7]
[1, 2, 3, 4, 5]
[0, 1, 2, 3, 4, 5]
Sample Output:
[10, 30, 60, 100, 150, 210, 217]
[1, 3, 6, 10, 15]
[0, 1, 3, 6, 10, 15]
Click me to see the sample solution

93. Write a Python program to find the middle character(s) of a given string. If the length of the string is even return the two middle characters. If the length of the string is odd, return the middle character. Go to the editor
Original string: Python
Middle character(s) of the said string: th
Original string: PHP
Middle character(s) of the said string: H
Original string: Java
Middle character(s) of the said string: av
Click me to see the sample solution

94. Write a Python program to find the largest product of the pair of adjacent elements from a given list of integers. Go to the editor
Original list: [1, 2, 3, 4, 5, 6]
Largest product of the pair of adjacent elements of the said list: 30
Original list: [1, 2, 3, 4, 5]
Largest product of the pair of adjacent elements of the said list: 20
Original list: [2, 3]
Largest product of the pair of adjacent elements of the said list: 6
Click me to see the sample solution

95. Write a Python program to check whether every even index contains an even number and every odd index contains odd number of a given list. Go to the editor
Original list of numbers: [2, 1, 4, 3, 6, 7, 6, 3]
Check whether every even index contains an even number and every
odd index contains odd number of a given list:
True
Original list of numbers: [2, 1, 4, 3, 6, 7, 6, 4]
Check whether every even index contains an even number and every
odd index contains odd number of a given list:
False
Original list of numbers: [2, 1, 4, 3, 6, 7, 6, 4]
Check whether every even index contains an even number and every
odd index contains odd number of a given list:
True
Click me to see the sample solution

96. Write a Python program to check whether a given number is a narcissistic number or not. Go to the editor

If you are a reader of Greek mythology, then you are probably familiar with Narcissus. He was a hunter of exceptional beauty that he died because he was unable to leave a pool after falling in love with his own reflection. That's why I keep myself away from pools these days (kidding).
In mathematics, he has kins by the name of narcissistic numbers - numbers that can't get enough of themselves. In particular, they are numbers that are the sum of their digits when raised to the power of the number of digits.
For example, 371 is a narcissistic number; it has three digits, and if we cube each digits 33 + 73 + 13 the sum is 371. Other 3-digit narcissistic numbers are
153 = 13 + 53 + 33
370 = 33 + 73 + 03
407 = 43 + 03 + 73.
There are also 4-digit narcissistic numbers, some of which are 1634, 8208, 9474 since
1634 = 14+64+34+44
8208 = 84+24+04+84
9474 = 94+44+74+44
It has been proven that there are only 88 narcissistic numbers (in the decimal system) and that the largest of which is
115,132,219,018,763,992,565,095,597,973,971,522,401
has 39 digits.

Ref.: //https://bit.ly/2qNYxo2
Sample Input:
(153)
(370)
(407)
(409)
(1634)
(8208)
(9474)
(9475)

Sample Output:
True
True
True
False
True
True
True
False
Click me to see the sample solution

97. Write a Python program to find the highest and lowest number from a given string of space separated integers. Go to the editor
Original string: 1 4 5 77 9 0
Highest and lowest number of the said string: (77, 0)
Original string: -1 -4 -5 -77 -9 0
Highest and lowest number of the said string: (0, -77)
Original string: 0 0
Highest and lowest number of the said string: (0, 0)
Click me to see the sample solution

98. Write a Python program to check whether a sequence of numbers has an increasing trend or not. Go to the editor
Sample Input:
[1,2,3,4]
[1,2,5,3,4]
[-1,-2,-3,-4]
[-4,-3,-2,-1]
[1,2,3,4,0]
Sample Output:
True
False
False
True
False
Click me to see the sample solution

99. Write a Python program to find the position of the second occurrence of a given string in another given string. If there is no such string return -1. Go to the editor
Sample Input:
("The quick brown fox jumps over the lazy dog", "the")
("the quick brown fox jumps over the lazy dog", "the")
Sample Output:
-1
31
Click me to see the sample solution

100. Write a Python program to compute the sum of all items of a given array of integers where each integer is multiplied by its index. Return 0 if there is no number. Go to the editor
Sample Input:
[1,2,3,4]
[-1,-2,-3,-4]
[]
Sample Output:
20
-20
0
Click me to see the sample solution

101. Write a Python program to find the name of the oldest student from a given dictionary containing the names and ages of a group of students. Go to the editor
Sample Input:
{"Bernita Ahner": 12, "Kristie Marsico": 11, "Sara Pardee": 14, "Fallon Fabiano": 11, "Nidia Dominique": 15}
{"Nilda Woodside": 12, "Jackelyn Pineda": 12.2, "Sofia Park": 12.4, "Joannie Archibald": 12.6, "Becki Saunder": 12.7}
Sample Output:
Nidia Dominique
Becki Saunder
Click me to see the sample solution

102. Write a Python program to create a new string with no duplicate consecutive letters from a given string. Go to the editor
Sample Input:
("PPYYYTTHON")
("PPyyythonnn")
("Java")
("PPPHHHPPP")
Sample Output:
PYTHON
Python
Java
PHP
Click me to see the sample solution

103. Write a Python program to check whether two given lines are parallel or not. Go to the editor
Note: Parallel lines are two or more lines that never intersect. Parallel Lines are like railroad tracks that never intersect.
The General Form of the equation of a straight line is: ax + by = c
The said straight line is represented in a list as [a, b, c]
Example of two parallel lines:
x + 4y = 10 and x + 4y = 14
Sample Input:
([2,3,4], [2,3,8])
([2,3,4], [4,-3,8])
Sample Output:
True
False
Click me to see the sample solution

104. Write a Python program to find a number in a given matrix, which is maximum in its column and minimum in its row. Go to the editor
Sample Input:
Original matrix: [[1, 2], [2, 3]]
Number in the said matrix which is maximum in its column and minimum in its row:
[2]
Original matrix: [[1, 2, 3], [3, 4, 5]]
Number in the said matrix which is maximum in its column and minimum in its row:
[3]
Original matrix: [[7, 5, 6], [3, 4, 4], [6, 5, 7]]
Number in the said matrix which is maximum in its column and minimum in its row:
[5]
Click me to see the sample solution

105. Write a Python program to check whether a given sequence is linear, quadratic or cubic. Go to the editor
Sequences are sets of numbers that are connected in some way.
Linear sequence:
A number pattern which increases or decreases by the same amount each time is called a linear sequence. The amount it increases or decreases by is known as the common difference.
Quadratic sequence:
In quadratic sequence, the difference between each term increases, or decreases, at a constant rate.
Cubic sequence:
Sequences where the 3rd difference are known as cubic sequence.
Sample Output:
Original Sequence: [0, 2, 4, 6, 8, 10]
Check the said sequence is Linear, Quadratic or Cubic?
Linear Sequence
Original Sequence: [1, 4, 9, 16, 25]
Check the said sequence is Linear, Quadratic or Cubic?
Quadratic Sequence
Original Sequence: [0, 12, 10, 0, -12, -20]
Check the said sequence is Linear, Quadratic or Cubic?
Cubic Sequence
Original Sequence: [1, 2, 3, 4, 5]
Check the said sequence is Linear, Quadratic or Cubic?
Linear Sequence
Click me to see the sample solution

106. Write a Python program to test whether a given integer is Pandigital number or not. Go to the editor
From Wikipedia,
In mathematics, a pandigital number is an integer that in a given base has among its significant digits each digit used in the base at least once.
For example,
1223334444555556666667777777888888889999999990 is a pandigital number in base 10.
The first few pandigital base 10 numbers are given by:
1023456789, 1023456798, 1023456879, 1023456897, 1023456978, 1023456987, 1023457689

Sample Output:
Original number: 1023456897 Check the said number is Pandigital number or not? True Original number: 1023456798 Check the said number is Pandigital number or not? True Original number: 1023457689 Check the said number is Pandigital number or not? True Original number: 1023456789 Check the said number is Pandigital number or not? True Original number: 102345679 Check the said number is Pandigital number or not? False
Click me to see the sample solution

107. Write a Python program to check whether a given number is Oddish or Evenish. Go to the editor
A number is called "Oddish" if the sum of all of its digits is odd, and a number is called "Evenish" if the sum of all of its digits is even.
Sample Output:
Original Number 120
Check whether the sum of all digits of the said number is odd or even!
Oddish
Original Number 321
Check whether the sum of all digits of the said number is odd or even!
Evenish
Original Number 43
Check whether the sum of all digits of the said number is odd or even!
Oddish
Original Number 4433
Check whether the sum of all digits of the said number is odd or even!
Evenish
Original Number 373
Check whether the sum of all digits of the said number is odd or even!
Oddish
Click me to see the sample solution

108. Write a Python program that takes three integers and check whether the sum of the last digit of first number and the last digit of second number equal to the last digit of third number. Go to the editor
Sample Input:
(12, 26, 44)
(145, 122, 1010)
(0, 20, 40)
(1, 22, 40)
(145, 129, 104)
Sample Output:
True
False
True
False
True
Click me to see the sample solution

109. Write a Python program find the indices of all occurrences of a given item in a given list. Go to the editor
Sample Input:
([1,2,3,4,5,2], 2)
([3,1,2,3,4,5,6,3,3], 3)
([1,2,3,-4,5,2,-4], -4)
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5, 2]
Given Number 2
Indices of all occurrences of the said item in the given list:
[1, 5]
Original list of numbers: [3, 1, 2, 3, 4, 5, 6, 3, 3]
Given Number 3
Indices of all occurrences of the said item in the given list:
[0, 3, 7, 8]
Original list of numbers: [1, 2, 3, -4, 5, 2, -4]
Given Number -4
Indices of all occurrences of the said item in the given list:
[3, 6]
Original list of numbers: [1, 2, 3, 4, 5, 2]
Given Number 7
Indices of all occurrences of the said item in the given list:
[]
Click me to see the sample solution

110. Write a Python program to remove the duplicate numbers from a given list of numbers. Go to the editor
Sample Input:
([1,2,3,2,3,4,5])
([1,2,3,2,4,5])
([1,2,3,4,5])
Sample Output:
Original list of numbers: [1, 2, 3, 2, 3, 4, 5]
After removing the duplicate numbers from the said list:
[1, 4, 5]
Original list of numbers: [1, 2, 3, 2, 4, 5]
After removing the duplicate numbers from the said list:
[1, 3, 4, 5]
Original list of numbers: [1, 2, 3, 4, 5]
After removing the duplicate numbers from the said list:
[1, 2, 3, 4, 5]
Click me to see the sample solution

111. Write a Python program to check whether two given circles (given center (x,y) and radius) are intersecting. Return true for intersecting otherwise false. Go to the editor
Sample Input:
([1,2, 4], [1,2, 8])
([0,0, 2], [10,10, 5])
Sample Output:
True
False
Click me to see the sample solution

112. Write a Python program to compute the digit distance between two integers. Go to the editor
The digit distance between two numbers is the absolute value of the difference of those numbers.
For example, the distance between 3 and -3 on the number line given by the |3 - (-3) | = |3 + 3 | = 6 units
Digit distance of 123 and 256 is
Since |1 - 2| + |2 - 5| + |3 - 6| = 1 + 3 + 3 = 7
Sample Input:
(123, 256)
(23, 56)
(1, 2)
(24232, 45645)
Sample Output:
7
6
1
11
Click me to see the sample solution

113. Write a Python program to reverse all the words which have even length. Go to the editor
Sample Input:
("The quick brown fox jumps over the lazy dog")
("Python Exercises")
Sample Output:
The quick brown fox jumps revo the yzal dog
nohtyP Exercises
Click me to see the sample solution

114. Write a Python program to print letters from the English alphabet from a-z and A-Z. Go to the editor
Sample Input:
("Alphabet from a-z:")
("\nAlphabet from A-Z:")
Sample Output:
Alphabet from a-z:
a b c d e f g h i j k l m n o p q r s t u v w x y z
Alphabet from A-Z:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Click me to see the sample solution

115. Write a Python program to generate and prints a list of numbers from 1 to 10. Go to the editor
Sample Input:
range(1,10)
Sample Output:
[1, 2, 3, 4, 5, 6, 7, 8, 9]
['1', '2', '3', '4', '5', '6', '7', '8', '9']
Click me to see the sample solution

116. Write a Python program to identify nonprime numbers between 1 to 100 (integers). Print the nonprime numbers. Go to the editor
Sample Input:
range(1, 101)
Sample Output:
Nonprime numbers between 1 to 100:
4
6
8
9
10
..
96
98
99
100
Click me to see the sample solution

117. Write a Python program to make a request to a web page, and test the status code, also display the html code of the specified web page. Go to the editor
Sample Output:
Web page status:
HTML code of the above web page:

Click me to see the sample solution

118. In multiprocessing, processes are spawned by creating a Process object. Write a Python program to show the individual process IDs (parent process, process id etc.) involved. Go to the editor
Sample Output:
Main line
module name: __main__
parent process: 23967
process id: 27986
function f
module name: __main__
parent process: 27986
process id: 27987
hello bob
Click me to see the sample solution

119. Write a Python program to check if two given numbers are Co Prime or not. Return True if two numbers are Co Prime otherwise return false. Go to the editor
Sample Input:
(17, 13)
(17, 21)
(15, 21)
(25, 45)
Sample Output:
True
True
False
False
Click me to see the sample solution

120. Write a Python program to calculate Euclid's totient function of a given integer. Use a primitive method to calculate Euclid's totient function. Go to the editor
Sample Input:
(10)
(15)
(33)
Sample Output:
4
8
20
Click me to see the sample solution

121. Write a Python program to create a coded string from a given string, using specified formula. Go to the editor
Replace all 'P' with '9', 'T' with '0', 'S' with '1', 'H' with '6' and 'A' with '8'
Original string: PHP
Coded string: 969
Original string: JAVASCRIPT
Coded string: J8V81CRI90
Click me to see the sample solution

122. Write a Python program to check if a given string contains only lowercase or uppercase characters. Go to the editor
Original string: PHP
Coded string: True
Original string: javascript
Coded string: True
Original string: JavaScript
Coded string: False
Click me to see the sample solution

123. Write a Python program to remove the first and last elements from a given string. Go to the editor
Original string: PHP
Removing the first and last elements from the said string: H
Original string: Python
Removing the first and last elements from the said string: ytho
Original string: JavaScript
Removing the first and last elements from the said string: avaScrip
Click me to see the sample solution

124. Write a Python program to check if a given string contains two similar consecutive letters. Go to the editor
Original string: PHP
Check for consecutive similar letters! False
Original string: PHHP
Check for consecutive similar letters! True
Original string: PHPP
Check for consecutive similar letters! True
Click me to see the sample solution

125. Write a Python program to reverse a given string in lower case. Go to the editor
Original string: PHP
Reverse the said string in lower case: php
Original string: JavaScript
Reverse the said string in lower case: tpircsavaj
Original string: PHPP
Reverse the said string in lower case: pphp
Click me to see the sample solution

126. Write a Python program to convert the letters of a given string (same case-upper/lower) into alphabetical order. Go to the editor
Original string: PHP
Convert the letters of the said string into alphabetical order: HPP
Original string: javascript
Convert the letters of the said string into alphabetical order: aacijprstv
Original string: python
Convert the letters of the said string into alphabetical order: hnopty
Click me to see the sample solution

127. Write a Python program to check whether the average value of the elements of a given array of numbers is a whole number or not. Go to the editor
Original array:
1 3 5 7 9
Check the average value of the elements of the said array is a whole number or not: True
Original array:
2 4 2 6 4 8
Check the average value of the elements of the said array is a whole number or not:
False
Click me to see the sample solution

128. Write a Python program to remove all vowels from a given string. Go to the editor
Original string: Python
After removing all the vowels from the said string: Pythn
Original string: C Sharp
After removing all the vowels from the said string: C Shrp
Original string: JavaScript
After removing all the vowels from the said string: JvScrpt
Click me to see the sample solution

129. Write a Python program to get the index number of all lower case letters in a given string. Go to the editor
Original string: Python
Indices of all lower case letters of the said string: [1, 2, 3, 4, 5] Original string: JavaScript
Indices of all lower case letters of the said string: [1, 2, 3, 5, 6, 7, 8, 9] Original string: PHP
Indices of all lower case letters of the said string: []
Click me to see the sample solution

130. Write a Python program to check whether a given month and year contains a Monday 13th. Go to the editor
Month No.: 11 Year: 2022
Check whether the said month and year contains a Monday 13th.: False
Month No.: 6 Year: 2022
Check whether the said month and year contains a Monday 13th.: True
Click me to see the sample solution

131. Write a Python program to count number of zeros and ones in the binary representation of a given integer. Go to the editor
Original number: 12
Number of ones and zeros in the binary representation of the said number: Number of zeros: 2, Number of ones: 2
Original number: 1234
Number of ones and zeros in the binary representation of the said number: Number of zeros: 6, Number of ones: 5
Click me to see the sample solution

132. Write a Python program to find all the factors of a given natural number. Go to the editor
Factors:
The factors of a number are the numbers that divide into it exactly. The number 12 has six factors:
1, 2, 3, 4, 6 and 12 If 12 is divided by any of the six factors then the answer will be a whole number. For example:
12 / 3 = 4
Original Number: 1
Factors of the said number: {1}
Original Number: 12
Factors of the said number: {1, 2, 3, 4, 6, 12}
Original Number: 100
Factors of the said number: {1, 2, 4, 100, 5, 10, 50, 20, 25}
Click me to see the sample solution

133. Write a Python program to compute the sum of the negative and positive numbers of an array of integers and display the largest sum. Go to the editor
Original array elements: {0, 15, 16, 17, -14, -13, -12, -11, -10, 18, 19, 20}
Largest sum - Positive/Negative numbers of the said array: 105
Original array elements: {0, 3, 4, 5, 9, -22, -44, -11}
Largest sum - Positive/Negative numbers of the said array: -77
Click me to see the sample solution

134. Write a Python program to alternate the case of each letter in a given string and the first letter of the said string must be uppercase. Go to the editor
Original string: Python Exercises
After alternating the case of each letter of the said string: PyThOn ExErCiSeS
Original string: C# is used to develop web apps, desktop apps, mobile apps, games and much more.
After alternating the case of each letter of the said string: C# iS uSeD tO dEvElOp WeB aPpS, dEsKtOp ApPs, MoBiLe ApPs, GaMeS aNd MuCh MoRe.
Click me to see the sample solution

135. Write a Python program to get the Least Common Multiple (LCM) of more than two numbers. Take the numbers from a given list of positive integers. Go to the editor
From Wikipedia,
In arithmetic and number theory, the least common multiple, lowest common multiple, or smallest common multiple of two integers a and b, usually denoted by lcm(a, b), is the smallest positive integer that is divisible by both a and b. Since division of integers by zero is undefined, this definition has meaning only if a and b are both different from zero. However, some authors define lcm(a,0) as 0 for all a, which is the result of taking the lcm to be the least upper bound in the lattice of divisibility.
Original list elements: [4, 6, 8]
LCM of the numbers of the said array of positive integers: 24
Original list elements: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
LCM of the numbers of the said array of positive integers: 2520
Original list elements: [48, 72, 108]
LCM of the numbers of the said array of positive integers: 432
Click me to see the sample solution

136. Write a Python program to reverse all the words which have odd length. Go to the editor
Original string: The quick brown fox jumps over the lazy dog
Reverse all the words of the said string which have odd length: ehT kciuq nworb xof spmuj over eht lazy god
Original string: Python Exercises
Reverse all the words of the said string which have odd length: Python sesicrexE
Click me to see the sample solution

137. Write a Python program to find the longest common ending between two given strings. Go to the editor
Original strings: running ruminating
Common ending between said two strings: ing
Original strings: thisisatest testing123testing
Common ending between said two strings:
Click me to see the sample solution

138. Write a Python program to reverse the binary representation of an given integer and convert the reversed binary number into an integer. Go to the editor
Original number: 13
Reverse the binary representation of the said integer and convert it into an integer: 11
Original number: 145
Reverse the binary representation of the said integer and convert it into an integer: 137
Original number: 1342
Reverse the binary representation of the said integer and convert it into an integer: 997
Click me to see the sample solution

139. Write a Python program to find the closest palindrome number of a given integer. If there are two palindrome numbers in absolute distance return the smaller number. Go to the editor
Original number: 120
Closest Palindrome number of the said number: 121
Original number: 321
Closest Palindrome number of the said number: 323
Original number: 43
Closest Palindrome number of the said number: 44
Original number: 1234
Closest Palindrome number of the said number: 1221
Click me to see the sample solution

140. Write a Python program to convert all items in a given list to float values. Go to the editor
Original list:
['0.49', '0.54', '0.54', '0.54', '0.54', '0.54', '0.55', '0.54', '0.54', '0.54', '0.55', '0.55', '0.55', '0.54', '0.55', '0.55', '0.54', '0.55', '0.55', '0.54']
List of Floats:
[0.49, 0.54, 0.54, 0.54, 0.54, 0.54, 0.55, 0.54, 0.54, 0.54, 0.55, 0.55, 0.55, 0.54, 0.55, 0.55, 0.54, 0.55, 0.55, 0.54]
Click me to see the sample solution

141. Write a Python program to get the domain name using PTR DNS records from a given IP address. Go to the editor
Domain name using PTR DNS:
dns.google
ec2-13-251-106-90.ap-southeast-1.compute.amazonaws.com
dns.google
ec2-23-23-212-126.compute-1.amazonaws.com
Click me to see the sample solution

142. Write a Python program to check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones of same length in a given string. Return True/False. Go to the editor
Original sequence: 001011
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
False
Original sequence: 01010101
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
True
Original sequence: 00
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
False
Original sequence: 000111000111
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
True
Original sequence: 00011100011
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
False
Original sequence: 0011101
Check if every consecutive sequence of zeroes is followed by a consecutive sequence of ones in the said string:
False
Click me to see the sample solution

143. Write a Python program to print Emojis using unicode characters or CLDR (Common Locale Data Repository ) short names. Go to the editor

Click me to see the sample solution

144. Write a Python program to convert integer to string. Go to the editor
Sample Input:
language = "Python"
version = 3.6
sample Output:
Language: Python, Version: 3.6
Click me to see the sample solution

145. Write a Python program to find the largest and smallest digit of a given number. Go to the editor
Original Number: 9387422
Largest Digit of the said number: 9
Smallest Digit of the said number: 2
Original Number: 500
Largest Digit of the said number: 5
Smallest Digit of the said number: 0
Original Number: 231548
Largest Digit of the said number: 8
Smallest Digit of the said number: 1
Click me to see the sample solution

146. A Python list contains two positive integers. Write a Python program to check whether the cube root of the first number is equal to the square root of the second number. Go to the editor
Sample Data:
([8, 4]) -> True
([64, 16]) -> True
([64, 36]) -> False
Click me to see the sample solution

147. A Python list contains three positive integers. Write a Python program to check whether the sum of the digits in each number is equal or not. Return true otherwise false. Go to the editor
Sample Data:
([13, 4, 22]) -> True
([-13, 4, 22]) -> False
([45, 63, 90]) -> True
Click me to see the sample solution

148. A Python list contains some positive integers. Write a Python program to count the numbers that are greater than the previous number on the list.Go to the editor
Sample Data:
([1, 4, 7, 9, 11, 5]) -> 4
([1, 3, 3, 2, 2]) -> 1
([4, 3, 2, 1]) -> 0
Click me to see the sample solution

149. Write a Python program that takes a positive integer and create an N x N square filled with the integer N. Display the N x N square.Go to the editor
Sample Data:
(2) -> [[2, 2], [2, 2]]
(5) -> [[5, 5, 5, 5, 5], [5, 5, 5, 5, 5], [5, 5, 5, 5, 5], [5, 5, 5, 5, 5], [5, 5, 5, 5, 5]]
(-6) -> []
Click me to see the sample solution

150. Write a Python program that takes a positive integer and calculate the cube root of the number until the number is less than three. Count the number of steps to complete the said process.Go to the editor
Sample Data:
(3) -> 1
(39) -> 2
(10000) -> 2
Click me to see the sample solution

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