3个点RE

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int s=0;
    string st;
    cin>>st;
    s+=(st[0]-'0');
    s+=(st[2]-'0')*2;
    s+=(st[3]-'0')*3;
    s+=(st[4]-'0')*4;
    s+=(st[6]-'0')*5;
    s+=(st[7]-'0')*6;
    s+=(st[8]-'0')*7;
    s+=(st[9]-'0')*8;
    s+=(st[10]-'0')*9;
    s%=11;
    if (s==10&&st[12]=='X')
        cout<<"Right";
    else if (s==(st[12]-'0')) cout<<"Right";
    else
    {
        for (int i=0;i<=11;++i)cout<<st[i];
        if(s==10) cout<<'X';
        else
        cout<<s;
    }
    return 0;
}