leetcode解题报告：Interleaving String

题目一:Combinations Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example,If n = 4 and k = 2, a solution is: [ [2,4], [3,4], [2,3], [1,2], [1,3], [1,4], ] 分析: 题意给我们一个数字n, 和一个数字k,让我们求出从 1~~n中取出k个数所能得到的组合数 所

题目一: Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the

Reorder List Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You must do this in-place without altering the nodes' values. For example,Given {1,2,3,4}, reorder it to {1,4,2,3}. 思路: 1.利用快慢两个指针将链表一分为二: 2.针对第二个子链表求倒序

Given a binary tree, return the postorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, 1 2 / 3 return [3,2,1]. Note: Recursive solution is trivial, could you do it iteratively? 注意:下面是迭代的解法.理解有点困难,和大家讨论一下. 1 import java.uti

Disk Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2368    Accepted Submission(s): 333 Problem Description 有很多从磁盘读取数据的需求,包括顺序读取.随机读取.为了提高效率,需要人为安排磁盘读取.然而,在现实中,这种做法很复杂.我们考虑一个相对简单的场景.磁

题目一:Subsets Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example, If S = [1,2,3], a solution is: [ [3], [1], [2]

LRU Cache Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise retu

题目一: Populating Next Right Pointers in Each Node Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; } Populate each next pointer to point to its next right node. If there is no next right node, the

先送上亚马逊传送门:<黑客与画家>:硅谷创业之父 Paul Graham 文集 再送上一个思维导图: 最好的办法就是自己创业或者加入创业公司 一个命题 命题 创业是一个压缩的过程,所有工作压缩成短短几年. 你不再是低强度的工作四十年,而是以极限强度工作四年 举例解释 一个优秀的黑客去除各种障碍,工作效率可以是在公司时的36倍. 假设他年薪8万美元,那么一个勤奋工作,摆脱杂事干扰的聪明黑客, 他的工作相当于年薪200万美元的价值 这里说的是极限情况,休闲时间为0,工作强度足以危害到健康. 守恒定

Linked List Cycle Given a linked list, determine if it has a cycle in it. Follow up:Can you solve it without using extra space? Linked List Cycle II Given a linked list, return the node where the cycle begins. If there is no cycle, return null. Follo