Solution: 3Sum
Explore the two pointers technique to solve the 3Sum problem by identifying unique triplets in an integer array that add to zero. Understand how sorting enables efficient skipping of duplicates and learn a step-by-step approach to implement this solution with O(n²) time complexity.
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Statement
Given an integer array nums, find all unique triplets [nums[i], nums[j], nums[k]] where i, j, and k are distinct indices, such that the three elements sum to zero.
The result must not contain any duplicate triplets. The order of the output and the order of elements within each triplet does not matter.
Note: The solution set must only include unique triplets. Two triplets are considered duplicates if they contain the same elements regardless of ordering.
Constraints:
nums.length...