leetcode 罗马数字

classSolution {
public:
intromanToInt(strings) {
intret=0;
for(inti=0; i<s.size(); i++){
if(s[i] =='I'&&s[i+1] =='V') {ret+=4;i++; continue;}
if(s[i] =='I'&&s[i+1] =='X') {ret+=9;i++; continue;}
if(s[i] =='X'&&s[i+1] =='L') {ret+=40;i++; continue;}
if(s[i] =='X'&&s[i+1] =='C') {ret+=90;i++; continue;}
if(s[i] =='C'&&s[i+1] =='D') {ret+=400;i++; continue;}
if(s[i] =='C'&&s[i+1] =='M') {ret+=900;i++; continue;}
if(s[i] =='I') ret+=1;
if(s[i] =='V') ret+=5;
if(s[i] =='X') ret+=10;
if(s[i] =='L') ret+=50;
if(s[i] =='C') ret+=100;
if(s[i] =='D') ret+=500;
if(s[i] =='M') ret+=1000;
        }
returnret;
    }
};