3Sum Trick Explained in 30 Seconds | Reduce 3Sum to 2Sum | Two Pointer Pattern
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YouTubeTechTrouble Solved
3Sum Trick Explained in 30 Seconds | Reduce 3Sum to 2Sum | Two Pointer Pattern
Most people overcomplicate the 3Sum problem. The key idea is simple: Fix one element (a) and reduce the problem to Two Sum. a + b + c = 0 b + c = -a This trick allows us to solve 3Sum using the Two Pointer technique in O(n²). This Short shows the key trick behind 3Sum. Full step-by-step explanation coming soon on this channel. Subscribe so you ...
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