Roman to Integer
来源：互联网 发布：搬瓦工和阿里云 编辑：程序博客网 时间：2024/06/06 07:27
class Solution {public: int romanToInt(string s) { if (s.length()==0) return 0; map<char, int> m; m['I'] = 1; m['V'] = 5; m['X'] = 10; m['L'] = 50; m['C'] = 100; m['D'] = 500; m['M'] = 1000; int n = s.length(); int sum = m[s[n-1]]; for (int i=n-2; i>=0; i--) { if (m[s[i+1]] <= m[s[i]]) sum += m[s[i]]; else sum -= m[s[i]]; } return sum; }};- Integer to Roman & Roman to Integer
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