# Category Archives: Combinatorial

Given an integer N, the task is to find the minimum steps to visit all integers in the range [1, N] by selecting any integer… Read More
Given a string S consisting of N digits, the task is to find the number of distinct Prime Numbers that can be formed using the… Read More
Given an integer array arr[]. Create a new array which is a rotation of given array and find the maximum Hamming distance between both the… Read More
Given two matrices sudoku[][] and region[][] of size N * N, the task is to fill the given Sudoku on the basis of the given… Read More
Given two integers N and M where N is the number of boxes placed in a row and M is the number of colours of… Read More
Given two positive integers N and M representing the count of distinct digits and alphabets respectively in a string, the task to count the number… Read More
Given the current position of a Knight as (i, j), find the count of different possible positions visited by a knight after N moves (in… Read More
Given an array, arr[] of size N and an integer K, the task is to find the number of ways of selecting K array elements,… Read More
Given two binary strings S1 and S2 of size N and M respectively such that the string S2 also contains the character ‘?’, the task… Read More
Given two positive integers R and B representing R red and B blue beans and an integer D, the task is to check whether it… Read More
Given a string S consisting of N characters and an array M[] of pairs of characters such that any character M[i] can be replaced with… Read More
Given two numbers N and M, the task is to find the minimum number of moves to change N to M or -1 if it’s… Read More
Given two arrays L[] and R[] of size N, and an integer K, the task is to find the number of ways to select exact… Read More
Given an array arr[] consisting of N positive integers and a positive integer X, the task is to find the number of pairs (i, j)… Read More
Given three integers N, L, and R, the task is to print the total count of ways to form a necklace of at most N… Read More