xinyu04

摘要： An ant and a blind spider are on opposite corners of a cube. The ant is stationary and the spider moves at random from one corner to another along the 阅读全文

摘要： Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. Soluti 阅读全文

摘要： Given a string s, return the longest palindromic substring in s. Solution 求在 $s$ 中的最长回文字串。对于每一个位置，进行左右拓展，计算出长度并更新答案即可。 $Notes:$ 对于奇数或者偶数长度的字串，为了统一： 奇数 阅读全文