【leetcode】【13】Roman to Integer
来源：互联网 发布：birch算法 编辑：程序博客网 时间：2024/06/05 11:49
一、问题描述
Given a roman numeral, convert it to an integer.
Input is guaranteed to be within the range from 1 to 3999.
二、问题分析
这道题和上一道一样，需要注意罗马数字的一些规则。
三、Java AC代码
public int romanToInt(String s) {int res = 0;int[] mid = new int[s.length()];for(int i=0;i<s.length();i++){switch (s.charAt(i)) {case 'I':mid[i] = 1;break;case 'V':mid[i] = 5;break;case 'X':mid[i] = 10;break;case 'L':mid[i] = 50;break;case 'C':mid[i] = 100;break;case 'D':mid[i] = 500;break;case 'M':mid[i] = 1000;break;}}res = mid[s.length()-1];for(int i= s.length()-2;i>=0;i-- ){if(mid[i]>=mid[i+1]){res+=mid[i];}else {if(mid[i+1]==5){while(mid[i]==1){res--;i--;if(i==-1) break;if(mid[i]!=1) {i++; break;}}}else {res-=mid[i];}}}return res;} 0 0
- leetcode-13：Roman to Integer
- leetcode 13 Roman to Integer
- Leetcode【13】：Roman to Integer
- [leetcode 13] Roman to Integer
- [Leetcode] 13 - Roman to Integer
- LeetCode | #13 Roman to Integer
- leetcode.13---------Roman to Integer
- leetCode #13 Roman to Integer
- leetcode-13 Roman to Integer
- leetcode 13 Roman to Integer
- LeetCode 13 Roman to Integer
- LeetCode 13 - Roman to Integer
- leetcode 13 -- Roman to Integer
- LeetCode 13："Roman to Integer"
- LeetCode---(13)Roman to Integer
- leetcode-13Roman to Integer
- leetcode 13: Roman to Integer
- Leetcode 13 Roman to Integer
- 【转】解决$Proxy0 cannot be cast to java.sql.Connection异常
- USACO1.1:friday
- 编程之路
- 如何发布自己的开源框架到CocoaPods
- 原生模拟器启动时无响应的解决
- 【leetcode】【13】Roman to Integer
- 小白学cordova——cordova环境配置和空白项目创建
- linux 安装tomcat8.0
- 在内存中执行k-means聚类算法
- 半年总结——放飞梦想
- PropertyPlaceholderConfigurer扩展，隐藏jdbc.properties中的用户名、密码、连接地址
- C 标准库—— assert.h
- Docker教程：docker的概念及安装
- 快速上手软件项目经验分享
