Problem: Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 遍历一次输入的字符串,如果不满足类似4或者9的就直接加相应的数,否则减去相应的数.其中对应如下”IVXLCDM“对应{1,5,10,50,100,500,1000} class Solution { public: int romanToInt(string s)…

LeetCode第13题 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,…

Roman to Integer Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 意思就是: 给出一个罗马数字,返回其对应的整数 num( 0<=num<=3999)表示: 罗马数字范围从 0-->3999 罗马数字有: I V X L C D M 1 5 10 50 100 500 1000 Math String So…

题目:罗马数字转换 题目难度:easy 题目内容: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…

这是悦乐书的第145次更新,第147篇原创 今天这道题和罗马数字有关,罗马数字也是可以表示整数的,如"I"表示数字1,"IV"表示数字4,下面这道题目就和罗马数字有关,你能猜到吗? 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第4题(顺位题号是17),给定一组罗马数字组成的字符串,将其转换为整数. 罗马数字包含下面7个字符: 符号 值 I 1 V 5 X 10 L 50 C 100 D 500 M 1000 下面是些小例子,帮助我们更好理解组…

Problem: Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases. Notes: It is intended for this problem…

String to Integer (atoi) time=272ms   accepted 需考虑各种可能出现的情况 public class Solution { public int atoi(String str) { int length=str.length(); long result=0; int flag=1; Boolean bFlag=false,bSpace=false,bNum=false; if(length<=0) return (int) result; else…

题目描述: 把字符串转化为整数值 原文描述: Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases. Notes: It is intended for…

Given a 32-bit signed integer, reverse digits of an integer. Example 1:                               Input: 123                       Output: 321 Example 2:                               Input: -123                      Output: -321 Example 3:     …

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…