leetcode 14 -- Longest Common Prefix
Longest Common Prefix 题目： Write a function to find the longest common prefix string amongst an array of strings. 题意： 找出所有字符串的最长的公共前缀 思路：先找到...
leetcode 13 -- Roman to Integer
Roman to Integer 题目： Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 题意： 把罗马...
leetcode 12 -- Integer to Roman
Integer to Roman 题目： Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 题意： 给于一个...
leetcode 11 -- Container With Most Water
Container With Most Water 题目： Given n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lines...
leetcode 10 -- Regular Expression Matching
Regular Expression Matching 题目： Implement regular expression matching with support for ‘.’ and ‘*’. ‘.’ Matches any single character. ‘*’ ...
leetcode 9 -- Palindrome Number
Palindrome Number 题目： Determine whether an integer is a palindrome. Do this without extra space. 题意： 判断一个整数是否是回文的，要求不使用额外的空间 思路： 简单起见我用...
leetcode 8 -- String to Integer (atoi)
String to Integer (atoi) 题目： Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want...
leetcode 7 -- Reverse Integer
Reverse Integer 题目： Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 题意: 给你一个整型数，要求返回它的反转数，...
leetcode 6 -- ZigZag Conversion
ZigZag Conversion 题目： The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display t...
leetcode 5 -- Longest Palindromic Substring
Longest Palindromic Substring 题目： Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is...