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题目：（DP，BackTracking， Greedy，String）Implement wildcard pattern matching with support for'?'and'*'.'?' Matches any single character.'*' Matches any sequ... 阅读全文
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题目：（DP， String）A message containing letters fromA-Zis being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encode... 阅读全文
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题目：（Greedy）There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the foll... 阅读全文
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题目：（Backtracking）The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting... 阅读全文
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题目：（DP ,BackTracking, String）Implement regular expression matching with support for'.'and'*'.'.' Matches any single character.'*' Matches zero or more... 阅读全文
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题目：（Stack， String）Given an absolute path for a file (Unix-style), simplify it.For example,path="/home/", =>"/home"path="/a/./b/../../c/", =>"/c"click ... 阅读全文
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题目：（String）Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique... 阅读全文
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题目：（Math）Given a positive integer, return its corresponding column title as appear in an Excel sheet.For example: 1 -> A 2 -> B 3 -> C ...... 阅读全文