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73 lines (66 loc) · 1.85 KB
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Copy pathromanToInteger
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73 lines (66 loc) · 1.85 KB
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private static int convertRomanToInteger(String roman) {
int ans=0;
for(int i=0;i<roman.length();i++){
char c=roman.charAt(i);
if(c=='I'){
if(i+1<roman.length()){
if(roman.charAt(i+1)=='V') {
ans += 4;
i++;
}
else if(roman.charAt(i+1)=='X'){
ans+=9;
i++;
}else
ans+=1;
}
else
{
ans+=1;
}
}
else if(c=='X'){
if(i+1<roman.length()){
if(roman.charAt(i+1)=='L') {
ans += 40;
i++;
}
else if(roman.charAt(i+1)=='C'){
ans+=90;
i++;
}else
ans+=10;
}
else
{
ans+=10;
}
}
else if(c=='C'){
if(i+1<roman.length()){
if(roman.charAt(i+1)=='D') {
ans += 400;
i++;
}
else if(roman.charAt(i+1)=='M'){
ans+=900;
i++;
}else
ans+=100;
}
else
{
ans+=100;
}
}
else if(c=='V')
ans+=5;
else if(c=='L')
ans+=50;
else if(c=='D')
ans+=500;
else if(c=='M')
ans+=1000;
}
return ans;
}