Top Problems on Two Pointers Technique for Interviews Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report The Two Pointer Approach is a powerful and efficient technique used to solve problems involving sorted arrays, searching, and optimization. By utilizing two pointers either moving towards each other or in the same direction, we can reduce the time complexity of many problems from O(n2) to O(n) or O(nlogā”n). This approach is widely used in competitive programming and real-world applications such as finding pairs with a given sum, merging sorted arrays, and optimizing subarray problems.Easy ProblemsRemove Occurrences Move Zeros To End Unique Elements in Sorted Array Reverse a string preserving space positions Sort an array of 0s, 1s and 2s Two Sum Pair Sum in a Sorted and Rotated Array Closest Pair SumClosest pair from two sorted arrays Smallest Subarray > Sum Dominant PairsSentence Palindrome Intersection of Arrays with Distinct Medium ProblemsCount pairs with absolute difference equal to k Triplet Sum in Array Sum of Two Equals Third K-th element of two ArraysUnion of 2 Sorted with Duplicates Subarrays with Max in RangeLongest Substring with K UniqueRemove and Reverse The Celebrity ProblemHard ProblemsTrapping Rain Water Problem 4 Sum - Check for Quadruple4 Sum ā All Distinct Quadruplets with given Sum Comment U ujjwalroq0 Follow Improve U ujjwalroq0 Follow Improve Article Tags : DSA two-pointer-algorithm Explore DSA FundamentalsLogic Building Problems 2 min read Analysis of Algorithms 1 min read Data StructuresArray Data Structure 3 min read String in Data Structure 2 min read Hashing in Data Structure 2 min read Linked List Data Structure 2 min read Stack Data Structure 2 min read Queue Data Structure 2 min read Tree Data Structure 2 min read Graph Data Structure 3 min read Trie Data Structure 15+ min read AlgorithmsSearching Algorithms 2 min read Sorting Algorithms 3 min read Introduction to Recursion 14 min read Greedy Algorithms 3 min read Graph Algorithms 3 min read Dynamic Programming or DP 3 min read Bitwise Algorithms 4 min read AdvancedSegment Tree 2 min read Binary Indexed Tree or Fenwick Tree 15 min read Square Root (Sqrt) Decomposition Algorithm 15+ min read Binary Lifting 15+ min read Geometry 2 min read Interview PreparationInterview Corner 3 min read GfG160 3 min read Practice ProblemGeeksforGeeks Practice - Leading Online Coding Platform 6 min read Problem of The Day - Develop the Habit of Coding 5 min read Like