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The Smart Way to Find Duplicates in an Array (No Extra Space!)
When I first saw LeetCode 442 — Find All Duplicates in an Array, my initial thought was: “Okay, I’ll just use a set to track occurrences.” But then I came across Index Marking, and it blew my mind!
When I first saw LeetCode 442 — Find All Duplicates in an Array, my initial thought was:
“Okay, I’ll just use a set to track occurrences.”
But then I came across Index Marking, and it blew my mind!
