xinyu04

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

摘要： Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any 阅读全文

摘要： Given a collection of candidate numbers (candidates) and a target number (target), find all unique combinations in candidates where the candidate numb 阅读全文

摘要： Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen nu 阅读全文

摘要： Given a collection of numbers, nums, that might contain duplicates, return all possible unique permutations in any order. Solution 对于有重复元素的全排列，我们用 $se 阅读全文

摘要： Given an integer array nums that may contain duplicates, return all possible subsets (the power set). The solution set must not contain duplicate subs 阅读全文

摘要： Given a directed acyclic graph (DAG) of n nodes labeled from 0 to n - 1, find all possible paths from node 0 to node n - 1 and return them in any orde 阅读全文

摘要： Given an n x n binary matrix grid, return the length of the shortest clear path in the matrix. If there is no clear path, return -1. A clear path in a 阅读全文

摘要： You are traveling down a path and come to a fork in the road. A sign lays fallen at the path indicating that one path leads to a village where everyon 阅读全文