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1.Reverse Integer 题目链接 题目要求： Reverse digits of an integer. Example1:x = 123, return 321 Example2:x = -123, return -321 click to show spoilers.... 阅读全文
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题目链接 题目要求： Given a stringSand a stringT, count the number of distinct subsequences ofTinS. A subsequence of a string is a new string which is for... 阅读全文
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题目链接 题目要求： Given a strings1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possib... 阅读全文
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题目链接 题目要求： Given two wordsword1andword2, find the minimum number of steps required to convertword1toword2. (each operation is counted as 1 step.) ... 阅读全文