4 Sum problem

Reading time: 50 minutes | Coding time: 60 minutes

In this article, we have explored an insightful approach/ algorithm to find the 4 elements in an array whose sum is equal to the required answer (4 Sum problem). This concept finds many uses in computational geometry.

CONTENTS OF THE ARTICLE:Problem Statement DefinitionMethod 1: Naive approachMethod 2: Sorting for efficiencyMethod 3: Auxiliary Space approachMethod 4: Hashing Based Solution (1)Method 5: Hashing Based Solution (2)Method 6...