02 2018 档案
摘要：A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ
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摘要：You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins. Given n, find the total number
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摘要：Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given target. E
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摘要：Design and implement a TwoSum class. It should support the following operations:add and find. add - Add the number to an internal data structure.find
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摘要：Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function
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摘要：Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex
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摘要：The API: int read4(char *buf) reads 4 characters at a time from a file.The return value is the actual number of characters read. For example, it retur
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摘要：The API: int read4(char *buf) reads 4 characters at a time from a file. The return value is the actual number of characters read. For example, it retu
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摘要：How would you design a URL shortening service that is similar to TinyURL? Background:TinyURL is a URL shortening service where you enter a URL such as
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摘要：TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL such as http
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摘要：Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may cont
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摘要：Given two binary strings, return their sum (also a binary string). The input strings are both non-empty and contains only characters 1 or 0. Example 1
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摘要：Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer
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摘要：There are a row of n houses, each house can be painted with one of the k colors. The cost of painting each house with a certain color is different. Yo
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摘要：There are a row of n houses, each house can be painted with one of the three colors: red, blue or green. The cost of painting each house with a certai
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摘要：You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl
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摘要：All LeetCode Questions List（Part of Answers, still updating） 题目汇总及部分答案（持续更新中） Leetcode problems classified by company 题目按公司分类(Last updated: October 2,
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摘要：There is a fence with n posts, each post can be painted with one of the k colors. You have to paint all the posts such that no more than two adjacent
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摘要：All LeetCode Questions List 题目汇总 Sorted by frequency of problems that appear in real interviews. Last updated: October 2, 2017Google (214)534 Design T
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摘要：You are given a m x n 2D grid initialized with these three possible values. Fill each empty room with the distance to its nearest gate. If it is impos
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摘要：The demons had captured the princess (P) and imprisoned her in the bottom-right corner of a dungeon. The dungeon consists of M x N rooms laid out in a
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摘要：Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.
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摘要：A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any p
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摘要：A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any p
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摘要：今天博客开通申请通过了，以后可以来这里发东西了，嘿嘿😁
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