LeetCode java 的相关内容

文章 2018-05-03 来自：开发者社区

leetcode算法题解(Java版)-6-链表,字符串

一、字符串处理题目描述 Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 思路把数字转化为罗马符号，根据罗马符号的规律，可以先用map来存储一下。之后把每一位添加到所求中去。语法点：StringBuffer是字符缓冲区，是可.....

文章 2018-05-01 来自：开发者社区

leetcode算法题解(Java版)-5-简单模拟,字符串处理

一、简单贪心题目描述 Given n non-negative integers a1 , a2 , ..., an , where each represents a point at coordinate (i, ai ). n vertical lines are drawn such that the two endpoints of line i is at (i, ai ) and....

文章 2018-04-29 来自：开发者社区

leetcode算法题解(Java版)-4-动态规划(杨辉三角问题)

一、简单模拟题目描述 Say you have an array for which the i th element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete as many transactions as you like ....

文章 2018-04-29 来自：开发者社区

leetcode算法题解(Java版)-3-广搜+HashMap

一、运算符——异或"^" 题目描述 Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it w.....

文章 2018-04-28 来自：开发者社区

leetcode算法题解(Java版)-2-最长回文子串

一、int数字反转题目描述Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 思路：题目很简单，需要注意的是：int型是32位的。1000000003 反转后就超了！所以需要包装类Integer中的最大值和最小值小技巧：为了实现反转，可以先把符号保存到flag.....

文章 2018-04-27 来自：开发者社区

leetcode算法题解(Java版)-1-二叉树遍历

又开始刷算法题了，正好在学Java，顺便也练练Java。题目描述 Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to right, then right to left for the next level and alternate betwe....

文章 2018-03-31 来自：开发者社区

【LeetCode-面试算法经典-Java实现】【111-Minimum Depth of Binary Tree（二叉树的最小深度）】

原题　　Given a binary tree, find its minimum depth. 　　The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 题目大意　　给定一棵两叉树求树的最小深度。...

文章 2017-11-12 来自：开发者社区

Leetcode 461. Hamming Distance JAVA语言

The Hamming distance between two integers is the number of positions at which the corresponding bits are different. Given two integers x and y, calculate the Hamming distance....

文章 2017-11-12 来自：开发者社区

Leetcode 463. Island Perimeter JAVA语言

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely....