NeetCode #496LC-1079MediumBacktracking
← Back to All Problems#496 · #1079 · Letter Tile Possibilities(活字印刷)
📌 Problem Statement & Constraints
You have
n tiles, each with one letter given in tiles. Return the number of possible non-empty sequences of letters you can make. Constraints: 1 <= tiles.length <= 7, uppercase English letters.🔒
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