-
Notifications
You must be signed in to change notification settings - Fork 19
/
RomanInteger.java
36 lines (35 loc) · 912 Bytes
/
RomanInteger.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
class Solution {
public int romanToInt(String S) {
int ans = 0, num = 0;
for (int i = S.length() - 1; i >= 0; i--) {
switch (S.charAt(i)) {
case 'I':
num = 1;
break;
case 'V':
num = 5;
break;
case 'X':
num = 10;
break;
case 'L':
num = 50;
break;
case 'C':
num = 100;
break;
case 'D':
num = 500;
break;
case 'M':
num = 1000;
break;
}
if (4 * num < ans)
ans -= num;
else
ans += num;
}
return ans;
}
}