# Tag Archives: combionatrics

Given an array of pairs arr[] of size N (N ≥ 3) where each element of pair is at most N and each pair is… Read More
Given three numbers N, X, and Y, find the count of unique binary strings of length N having at least X 0s and Y 1s.… Read More
Given an integer N and a vector of strings prefixes[], the task is to calculate the total possible strings of length N from characters ‘0’… Read More
Given an array vec[] of size N of non-negative integers. The task is to count the number of subsequences with the sum equal to S… Read More
Given an array arr[] of N integers and an integer K, the task is to find the sum of the difference between the maximum and… Read More
Given a string S, in one move it is allowed to remove two adjacent equal characters. After the removal, both endpoints of the removed characters… Read More
Go to CDN’s CopyGiven three integers N, M and P, the task is to find the total number of valid arrays that can be created… Read More
Given two positive integers N and K, the task is to find the mean of the minimum of all possible subsets of size K from… Read More
Given two integers N and K, find the distinct number of ways to create an array of N elements where each element is in the… Read More
Given a string S consisting of N digits and an integer K, the task is to count the number of ways to remove digits from… Read More
Given an integer N representing the number of red and blue candies and a matrix mat[][] of size N * N, where mat[i][j] = 1… Read More
Given an integer N, the task is to paint a grid of size N x 3 using colors Red, Yellow, or Green while making such… Read More
Given a string S of length N, the task is to count the number of anagrams of S whose first character is a consonant and… Read More
Given a binary string S of length N consisting of 0s, 1s, and “?”, where “?” can be replaced by either 0 or 1, the… Read More
Given an integer N, the task is to tile a board of dimensions N * 1 the task is to count the number of ways… Read More