In this problem, we are given an array of size n and a positive integer r. Our task is to print all possible combinations of the elements of the array of size r.Let’s take an example to understand the problem −Input: {5, 6, 7, 8} ; r = 3 Output ... Read More

In this problem, we are given a string of integers from 0 to 9 and a target value. We have to print out ways in which we can generate expression using +, -, and * operation which is evaluated to the value equal to target.Let’s take an example to understand ... Read More

In this problem, we are given an mXn 2D matrix and we have to print all possible paths from top left to the bottom right of the matrix. For traversal, we can move only right and down in the matrix.Let’s take an example to understand the topic better −Input: 1 ... Read More

In this problem, we are given a set of characters and a positive integer k and we have to print all possible strings of length k that can be generated using the characters of the set.Let’s take an example to understand the problem better −Input: set = {‘x’, ‘y’, ‘z’} ... Read More

In this problem, we are given a string and we have to print all those string that can be made using this string by placing space in between the characters of the string.Let’s take an example to understand the topic better −Input: string = ‘XYZ’ Output: XYZ, XY Z, X ... Read More

In this problem, we are given a positive integer N and we have to print the sequence of all possible consecutive numbers with a sum equal to N.Let’s take an example to understand the problem, Input: N = 15 Output: 1 2 3 4 5 7 8A simple solution to ... Read More

In this problem, we are given a number and we have to print all words that can be formed by pressing those words in an old fashioned mobile keyboard.We are quite familiar with the QWERTY keyboard style that we use today. But before the invention of QWERTY keypad phones were ... Read More

In this problem, we are given a number N, and we have to find all unique prime factors and their powers that divide the number.Let’s take an example to understand the topic −Input: 55 Output: 5 power 1 11 power 1Explanation −55 is divisible by 5 and 11.To solve this ... Read More

In this problem, we are given a number N and we have to print all prime numbers less than or equal to N.Let’s take an example to understand the topic better −Input: 10 Output: 2 3 5 7A prime number is a number that can be divided by only one ... Read More

In this problem, we are given a positive integer N, and we have to print all prime quadruplet less than or equal to n.Prime quadruplets are the set of four prime numbers calculated as {p, p+2, p+6, p+8}. Example − 5 7 11 13.Let’s take an example to understand the ... Read More