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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int romanToInt(string s) {
  5.     map<char, int> m;
  6.     m['I'] = 1;
  7.     m['V'] = 5;
  8.     m['X'] = 10;
  9.     m['L'] = 50;
  10.     m['C'] = 100;
  11.     m['D'] = 500;
  12.     m['M'] = 1000;
  13.     int len = s.length();
  14.     if(len <= 0)
  15.         return 0;
  16.     int result = m[s[len - 1]];
  17.     for(int i = len - 2; i >= 0; i--){
  18.         if(m[s[i]] < m[s[i+1]]){
  19.             result = result - m[s[i]];
  20.         }else{
  21.             result = result + m[s[i]];
  22.         }
  23.     }
  24.     return result;
  25. }
  26.  
  27. int main() {
  28. 	cout << romanToInt("XIV");
  29. 	return 0;
  30. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/CCO0w0
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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