求各位大佬帮忙康康qwq

#include<bits/stdc++.h>
using namespace std;
int main(){
	char a[15];
	int b = 1,n = 0;
	for(int i = 1;i <= 13;i++){
		cin>>a[i];
		if(a[i] >= '0' && a[i] <= '9' && i != 13){
			n+=(int)((a[i]-'0')*b);
			b++;
		}
	}
	n%=11;
	if(n == (int)(a[13]-'0')){
		cout<<"Right";
	}
	else{
		for(int i = 1;i <= 12;i++){
			cout<<a[i];
		}
		cout<<n;
	}	
	
	return 0;
}