题意: Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 分析: 题目其实不难,但是需要先了解罗马数字的组成规则. 摘录百度百科如下: 相同的数字连写,所表示的数等于这些数字相加得到的数,如 Ⅲ=3: 小的数字在大的数字的右边,所表示的数等于这些数字相加得到的数,如 Ⅷ=8.Ⅻ=12: 小的数字(限于 Ⅰ.X 和 C)在大的数字的左…
罗马数字包含以下七种字符: I, V, X, L,C,D 和 M. 字符 数值 I 1 V 5 X 10 L 50 C 100 D 500 M 1000 例如, 罗马数字 2 写做 II ,即为两个并列的 1.12 写做 XII ,即为 X + II . 27 写做 XXVII, 即为 XX + V + II . 通常情况下,罗马数字中小的数字在大的数字的右边.但也存在特例,例如 4 不写做 IIII,而是 IV.数字 1 在数字 5 的左边,所表示的数等于大数 5 减小数 1 得到的数值 4…
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) { ; ];…
Given an integer, convert it to a roman numeral. The number is guaranteed to be within the range from 1 to 3999. Have you met this question in a real interview? Clarification What is Roman Numeral? https://en.wikipedia.org/wiki/Roman_numerals htt…
Roman chart: http://literacy.kent.edu/Minigrants/Cinci/romanchart.htm Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 解析:只有数字为 9 和 4 时,取一个小数放在左边.(把数字为 9 和 4 时的罗马符号看作一个原子,避免取…
12. Integer to Roman Total Accepted: 71315 Total Submissions: 176625 Difficulty: Medium Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 思路: 首先,我们得弄清楚罗马数字的计数方式.根据维基百科的介绍:https://zh.wikipedia.…
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…
一.Roman to Integer Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 罗马数字是阿拉伯数字传入之前使用的一种数码.罗马数字采用七个罗马字母作数字.即Ⅰ(1).X(10).C(100).M(1000).V(5).L(50).D(500).记数的方法: 相同的数字连写,所表示的数等于这些数字相加得到的数,如:Ⅲ = 3…
# -*- 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…
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. 拿到题目,分析,比较简单,除掉相应的基数单位,拼接起来就可以,不过要注意4,9这些特殊的表示. 先上我的代码吧: public String intToRoman(int num){ StringBuffer sb=new StringBuff…
12. Integer to Roman Total Accepted: 71315 Total Submissions: 176625 Difficulty: Medium Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 思路: 首先,我们得弄清楚罗马数字的计数方式.根据维基百科的介绍:https://zh.wikipedia.…
leetcode-algorithms-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 toge…
Integer to Roman Given an integer, convert it to a roman numeral. The number is guaranteed to be within the range from 1 to 3999. Clarification What is Roman Numeral? https://en.wikipedia.org/wiki/Roman_numerals https://zh.wikipedia.org/wiki/%E7%BD%9…
Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 逐区间做处理. 解法一:非递归 class Solution { public: string intToRoman(int num) { string ret; //M<-->1000 ) { ret += 'M'; num -= ; } //t…
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 1: 从大到小的贪心写法.从大到小匹配,尽量多地匹配当前的字符. 罗马数字对照表: http://literacy.kent.edu/Minigrants/Cinci/romanchart.htm package Algorithm…
我现在在做一个叫<leetbook>的免费开源书项目,力求提供最易懂的中文思路,目前把解题思路都同步更新到gitbook上了,需要的同学可以去看看 书的地址:https://hk029.gitbooks.io/leetbook/ 012. Integer to Roman[M] 问题 Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999…
Integer to Roman Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 意思就是: 给出一个整数 num( 0<=num<=3999),返回其对应的罗马数字表示: 罗马数字有: I V X L C D M 1 5 10 50 100 500 1000 Math String Solutions 1 Integer to…
12. Integer to Roman Medium 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…
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 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 is written as, XII, which i…
Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 之前那篇文章写的是罗马数字转化成整数(http://www.cnblogs.com/grandyang/p/4120857.html), 这次变成了整数转化成罗马数字,基本算法还是一样.由于题目中限定了输入数字的范围(1 - 3999), 使得题目变得简单了不少. 基本字符 I V…
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…
