摘要:
17. Letter Combinations of a Phone Number Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number 阅读全文
posted @ 2019-09-18 03:07
Schwifty
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摘要:
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. Example: backtracking的变种 阅读全文
posted @ 2019-09-18 02:33
Schwifty
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