Permutation and Combination

Calculate Combinations and Permutations in R

Last Updated: 30 July 2024

Combinatorics is an important aspect of data analysis and statistics. It is used to solve many aptitude-based and real-life problems. While ...read more

Ways to sum to N using Natural Numbers up to K with repetitions allowed

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Last Updated: 13 April 2023

Given two integers N and K, the task is to find the total number of ways of representing N as the sum of positive integers in the range [1, ...read more

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Last Updated: 05 April 2025

In Mathematics, Permutation is defined asa mathematical concept that determines the number of possible arrangements for a specific set of el...read more

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Count all possible N-length vowel permutations that can be generated based on the given conditions

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Last Updated: 15 January 2024

Given an integer N, the task is to count the number of N-length strings consisting of lowercase vowels that can be generated based the follo...read more

Count permutations of given array that generates the same Binary Search Tree (BST)

Last Updated: 18 August 2021

Given an array, arr[] of size N consisting of elements from the range [1, N], that represents the order, in which the elements are inserted ...read more

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Find the Nth row in Pascal's Triangle

Last Updated: 26 April 2025

Given a non-negative integer n, the task is to find the nth row of Pascal's Triangle.Note: The row index starts from 1.Examples:Input: n = 4...read more

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Number of ways to go from one point to another in a grid

Last Updated: 16 April 2021

Given the NxN grid of horizontal and vertical roads. The task is to find out the number of ways that the person can go from point A to point...read more

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Find All Permutations of an Array using STL in C++

Last Updated: 15 November 2024

The permutation of an array refers to a rearrangement of its elements in every possible order. In this article, we will learn how to generat ...read more

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Program to calculate the value of nPr

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Last Updated: 19 March 2025

Given two numbers, n and r, the task is to compute nPr, which represents the number of ways to arrange r elements from a set of n elements. ...read more

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Print all permutations of a string in Java

Last Updated: 08 December 2022

Given a string str, the task is to print all the permutations of str. A permutation is an arrangement of all or part of a set of objects, wi ...read more

Number of integral solutions of the equation x1 + x2 +.... + xN = k

Last Updated: 07 March 2024

Given N and K. The task is to count the number of the integral solutions of a linear equation having N variable as given below:x1 + x2+ x3.. ...read more

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Different ways to represent N as sum of K non-zero integers

Last Updated: 23 May 2022

Given N and K. The task is to find out how many different ways there are to represent N as the sum of K non-zero integers.Examples:Input: N ...read more

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Number of arrays of size N whose elements are positive integers and sum is K

Last Updated: 07 January 2024

Given two positive integers N and K. The task is to find the number of arrays of size N that can be formed such that elements of the array s ...read more