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Grokking the Coding Interview Patterns in C++

Solution: 3Sum

Explore the two pointers method to solve the 3Sum problem efficiently by sorting the array and searching for triplets that sum to zero. Understand how to handle duplicates, control pointer movements, and write clean C++ code for this classic interview question.

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Statement

Given an integer array, nums, find and return all unique triplets [nums[i], nums[j], nums[k]], such that i ≠ \neq j, i ≠\neq k, and j ≠\neq k and nums[i] + nums[j] + nums[k] ==0== 0 ...