求求了看了三天了

#include <cstring>
#include <iostream>
using namespace std;
int main(){char c[13];int j=1;int numb;
cin>>c;char n;
for(int i=0;i<11;i++){
if(c[i]!='-'){numb=(c[i]-'0')*j++;}}
int m=numb%11;
if(m!=10){ n=m;}
else{ n='X';}

if(c[12]==n){cout<<"Right"<<endl;}
else{c[12]=n+'0';cout<<c<<endl;}

return 0;
}