目录 题目链接 注意点 解法 小结 题目链接 Integer to Roman - LeetCode 注意点 考虑输入为0的情况 解法 解法一:从大到小考虑1000,900,500,400,100,90,50,40,10,9,5,4,1这些数字,大于就减去,直到为0.时间复杂度为O(n) class Solution { public: string intToRoman(int num) { string ans = ""; while(num > 0) { if(num &g…

Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. Solution 1: class Solution { public: string intToRoman(int num) { // 关键 , , , , , , , , , , , , }; const string symbol[] = {"M", "CM…

问题描述: Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 分析: /** * 将一个Integer数字转换为罗马数字,范围 1-3999 * integer数据与罗马数字之间的对应关系,列举出来,建立一个二维数组 * 1~9: {"I", "II", "III", "I…

Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 将整数用罗马数字表示. 思路分析: {"","I","II","III","IV","V","VI","VII","VIII…

12 - Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. Solution: 枚举,考虑每个字符以及每两个字符的组合 1 class Solution { 2 public: 3 string intToRoman(int num) { //runtime:28ms 4 string ret; 5…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com'https://oj.leetcode.com/problems/integer-to-roman/Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999.===Comments by D…

1.题目 12. Integer to Roman Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, two is written as II in Roman numeral, just two one's added together. Twelve i…

Roman to Integer Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 首先学习一下罗马数字的规则: 羅馬數字共有7個,即I(1).V(5).X(10).L(50).C(100).D(500)和M(1000).按照下述的規則可以表示任意正整數.需要注意的是罗马数字中没有“0”,與進位制無關.一般認為羅馬數字只用來記數,而…

Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999.   罗马数字的组数规则,有几条须注意掌握:(1)基本数字Ⅰ.X .C 中的任何一个,自身连用构成数目,或者放在大数的右边连用构成数目,都不能超过三个:放在大数的左边只能用一个.(2)不能把基本数字 V .L .D 中的任何一个作为小数放在大数的左边采…

Roman to Integer Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 思路:首先要学一下罗马数字是怎么表示的,参见百度百科 其实看了上面罗马数字的介绍,可以建一个对应表 把数字和字母对应起来.遇到 I X C且后面字母的数字更大时 减去当前数字,否则加上. int romanToInt(string s) { ; ];…