Given a string, find the length of the longest substring T that contains at most k distinct characters. For ex…

My code: public class Solution { int[] nums; int result = Integer.MAX_VALUE; Random r; public Solution(int[] n…

当李特第一次把这题拿出来的时候，我是慌的。 啥是LRU Cache啊？ 接下去看吧。 后来，我很天真的来了一个O(n) 的解法，结果果然时间过多。天真解法很简单啊：一个map<key,value>存数值。一个…

  Given a robot cleaner in a room modeled as a grid. Each cell in the grid can be empty or blocked. The r…

Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C&nb…

本文首发于我的个人博客：尾尾部落 链表是面试过程中经常被问到的，这里把剑指offer 和 LeetCode 中的相关题目做一个汇总，方便复习。 1. 在 O(1) 时间删除链表节点 题目描述：给定单向链表的头指针和一个节…

题目 Suppose Andy and Doris want to choose a restaurant for dinner, and they both have a list of favorite restau…

  Given an array of n integers where n > 1, nums, return an array output such that output[i] is equal …

  The Hamming distance between two integers is the number of positions at which the correspondi…

  Given an m * n matrix M initialized with all 0’s and several update operations. Op…

Say you have an array for which the ith element is the price of a given stock on day i. Design …

Given a sorted linked list, delete all duplicates such that each element appear only once. For example, G…