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DSA / Algorithms

Algorithms

9.1K+ posts

DP Problems Dimension Wise (1D, 2D and 3D)

Last Updated: 23 July 2025

When we solve a Dynamic Programming (DP) problem, we store solution in an array. The dimensions of the array are dependent on number of variables that change in recursive ...read more

Dynamic Programming

DP Standard Problem Variations

Last Updated: 23 July 2025

When we solve Dynamic Programming problems, we try to find a pattern by matching pattern with a standard DP problem. This is generally recommended to solve new DP problems...read more

Dynamic Programming

binomial coefficient

Assign Maximum Cookies

Last Updated: 02 September 2025

Given two arrays, greed[] and cookie[] such that greed[i] denotes the minimum cookie size wanted by ith child and cookie[i] denotes the size of ith cookie, we have to find...read more

Tips and Tricks to Find GCD

Last Updated: 14 October 2024

Let us first discuss the standard method to find GCD of two numbers a and b.Step 1: List all the divisors of the number ‘a’.Step 2: List all the divisors of the number ‘b’...read more

School Learning

Prime Factorization Tips and Tricks

Last Updated: 23 July 2025

Let us first go through the standard Prime Factorization by the Division Method. Then we will be talking about tips and tricks to make it faster.Step 1: Divide the number ...read more

article_image

School Learning

Interesting Facts about Prime Factorization

Last Updated: 23 July 2025

1. Every integer greater than 1 can be uniquely factored into prime numbers. This is known as the Fundamental Theorem of Arithmetic. For example, 60 can be written as 22×3...read more

School Learning

Is 0 divisble by every Integer

Last Updated: 09 April 2025

Yes, 0 is considered to be divisible by every integer other than 0. Dividing by zero itself is undefined, so 0 is not divisible by 0.Why? Let a,b be integers. Then b is ...read more

School Learning

Last Updated: 05 August 2025

Given a sorted array arr[] and a number target, find the upper bound of the target in this given array. The upper bound of a number is defined as the smallest index in the...read more

Last Updated: 05 August 2025

Given a sorted array arr[] and a number target, find the lower bound of the target in this given array. The lower bound of a number is defined as the smallest index in the...read more

Intersection of Two Sorted Arrays with Distinct Elements

Last Updated: 23 July 2025

Given two sorted arraysa[]andb[] with distinct elements of sizenandm respectively, the task is to find intersection (or common elements) of the two arrays. We need to retu...read more

union-intersection

4 Sum - Find any quadruplet having given sum

Last Updated: 03 February 2026

Given an array arr[] of integers and an integer target, the task is to find any quadruplet in arr[] such that it's sum is equal to the target. Note: If there are multiple...read more

two-pointer-algorithm

4 Sum - Quadruplet Sum Closest to Target

Last Updated: 23 January 2026

Given an array arr[] of n integers and an integer target, the task is to find a quadruplet in arr[] whose sum is closest to target.Note: There may be multiple quadruplets ...read more

two-pointer-algorithm

Union of Two Sorted Arrays with Distinct Elements

Last Updated: 23 July 2025

Given two sorted arrays a[] and b[] with distinct elements, the task is to returnunionof both the arrays in sorted order.Note:Union of two arrays is an array having alldis...read more

article_image

union-intersection

2 Sum - Find a pair with given sum

Last Updated: 23 July 2025

Given an array of integers arr[] and an integer target, print a pair of two numbers such that they add up to target. You cannot use the same element twice.Examples:Input: ...read more

Union of Two Sorted Arrays

Last Updated: 23 July 2025

Given two sorted arrays a[] and b[], the task is to returnunionof both the arrays insorted order. Union of two arrays is an array having alldistinctelements that are prese...read more

article_image

union-intersection

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