3 Sum Optimal Solution. Detailed solution for 3 Sum : Find triplets that add up to a

Detailed solution for 3 Sum : Find triplets that add up to a zero - Problem Statement: Given an array of N integers, your task is to find unique triplets that add up to give a sum of zero. To efficiently find the j and k pairs, we run the two pointer approach on the elements to the right of index i as the array is sorted. 3Sum. This will be solved keeping the foundation of "2-SUM" so that you can easily relate and understa Nov 23, 2023 · Join Medium for free to get updates from this writer. We also obtain the first Looking to solve the popular LeetCode Two Sum problem efficiently? This classic coding interview question asks you to find two numbers in an array that add up to a specific target. 3Sum problem of Leetcode. Each list contain n n numbers. The basic solution would be O(n³) and use three for-loops to check every single Aug 29, 2025 · The journey from O (N³) brute force to O (N²) optimal solution showcases how systematic thinking and incremental improvements lead to elegant algorithms. If such a triplet is present, we need to print it and return true. linkedin.

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