Submission

Score: 95

User: IIIIIIIIIIII

Problemset: ISBN

Language: cpp

Time: 0.004 second

Submitted On: 2026-10-12 00:18:55

#include <iostream>
using namespace std;
int main(){
    int n, k=10, sum=0;
    for(int i=0;i<9;i++){
        cin >> n;
        sum+=n*k;
        k--;
    }if(sum==0 && sum%11==0) cout << '0';
    else cout << 11-(sum%11);
}