leetcode 1079 Letter Tile Possibilities
lc1079 Letter Tile Possibilities 利用遞歸解決 觀察題目給出的例子 AAB 按照長度分 A, B AA, AB, BA AAB, ABA, BAA 不難發現，長度為n的解可由長度為n-1的解推出 利用遞歸，每次長度為n的解可以遞歸了化簡至長度 ...
原文：[Swift]LeetCode1079. 活字印刷 | Letter Tile Possibilities
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