80分求助

#include<bits/stdc++.h>
using namespace std;
int main()
{
    char s[13];
    int f=0;

    cin>>s;

    f+=(s[0]-'0')*1;
    f+=(s[2]-'0')*2;
    f+=(s[3]-'0')*3;
    f+=(s[4]-'0')*4;
    f+=(s[6]-'0')*5;
    f+=(s[7]-'0')*6;
    f+=(s[8]-'0')*7;
    f+=(s[9]-'0')*8;
    f+=(s[10]-'0')*9;

    f%=11;

    if(s[12]-'0'==f or (s[12]==88 and (int)s[12]-78==10))
    {
        cout<<"Right";
    }
    else
    {
        for(int i=0;i<12;i++)
        {
            cout<<s[i];
        }
        if(f==10)
        {
            cout<<"X";
        }
        else
        {
            cout<<f;
        }
    }
    return 0;
}
//1 5 11