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two-pointer-algorithm

213+ posts

Top Problems on Two Pointers Technique for Interviews

Last Updated: 23 July 2025

The Two Pointer Approach is a powerful and efficient technique used to solve problems involving sorted arrays, searching, and optimization. By utilizing two pointers eithe...read more

two-pointer-algorithm

3 Sum - Count Triplets With Given Sum In Sorted Array

Last Updated: 23 July 2025

Given a sorted arrayarr[]and a target value, the task is to find the count of triplets present in the given array having sum equal to the given target.More specifically, t...read more

two-pointer-algorithm

4 Sum - Find any quadruplet having given sum

Last Updated: 23 July 2025

Given an array arr[] of n 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 multipl...read more

two-pointer-algorithm

4 Sum - Quadruplet Sum Closest to Target

Last Updated: 23 July 2025

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

2 Sum - Pair Sum Closest to Target

Last Updated: 23 July 2025

Given an array arr[] of n integers and an integer target, the task is to find a pair in arr[] such that it’s sum is closest to target.Note:Return the pair in sorted order ...read more

two-pointer-algorithm

3Sum - Complete Tutorial

Last Updated: 23 July 2025

The 3-Sum problem is a classic algorithmic problem where the objective is to find all unique triplets in an array that sum up to a specific target value, usually zero. Thi...read more

two-pointer-algorithm

2Sum - Complete Tutorial

Last Updated: 23 July 2025

The 2-Sum problem is a popular algorithmic challenge where the goal is to identify two distinct elements in an array whose sum equals a specific target. The problem emphas...read more

two-pointer-algorithm

Minimum boats to save people

Last Updated: 23 July 2025

Given an array people[] where people[i] is the weight of the ith person, and an infinite number of boats where each boat can carry at most two people at a time with total ...read more

two-pointer-algorithm

Interview-Questions

Remove All Occurrences of an Element in an Array

Last Updated: 09 November 2024

Given an integer array arr[] and an integer ele the task is to the remove all occurrences of ele from arr[] in-place and return the number of elements which are not equal ...read more

two-pointer-algorithm

Interview-Questions

Count number of times given sentence can be fitted on screen

Last Updated: 11 June 2024

Given a screen with dimensions rows*cols, and a sentence represented as a list of strings. The task is to return the number of times the given sentence can be fitted on th...read more

two-pointer-algorithm

Interview-Questions

Two Sum - Pair sum in sorted array

Last Updated: 23 July 2025

Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these t...read more

two-pointer-algorithm

Put Maximum Number of Boxes Into the Warehouse II

Last Updated: 23 April 2024

You are given two arrays of positive integers, boxes[] and warehouse[]. The boxes array represents the heights of some boxes of unit width, and the warehouse array represe...read more

two-pointer-algorithm

CSES Solutions - Sum of Three Values

Last Updated: 23 July 2025

You are given an array arr[] of N integers, and your task is to find three values (at distinct positions) whose sum is X. Note: The indices can be printed in any order.Exa...read more

Competitive Programming

two-pointer-algorithm

CSES Solutions - Sum of Four Values

Last Updated: 23 July 2025

You are given an array arr[] of N integers, and your task is to find four values (at distinct positions) whose sum is X. Note: If there are multiple answers, print any one...read more

Competitive Programming

two-pointer-algorithm

Two-Pointer Technique in a Linked List

Last Updated: 23 July 2025

The two-pointer technique is a common technique used in linked list problems to solve a variety of problems efficiently. It involves using two pointers that traverse the l...read more

two-pointer-algorithm

Data Structures and Algorithms-QnA

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