LeetCode Two Sum: Why the HashMap Solution Actually Works #lindorcodes #leetcode
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YouTubeLindorCodes
LeetCode Two Sum: Why the HashMap Solution Actually Works #lindorcodes #leetcode
The key insight is simple algebra: if X + Y = target, then X = target − Y. At every step, you check if the complement already exists in your HashMap — if it does, you're done. If not, you store the current value and its index and keep moving. One pass. Linear time. No tricks. We code it live on LeetCode and it passes clean. Time complexity ...
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Two Sum Solution
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