题目来源https://leetcode.com/problems/longest-valid-parentheses/Given a string containing just the characters'('and')', find the length of the longest val... Read More
题目来源https://leetcode.com/problems/substring-with-concatenation-of-all-words/You are given a string,s, and a list of words,words, that are all of the s... Read More
题目来源https://leetcode.com/problems/next-permutation/Implement next permutation, which rearranges numbers into the lexicographically next greater permut... Read More