Submission

Score: 100

User: kawinavokiwi

Problemset: ISBN

Language: cpp

Time: 0.005 second

Submitted On: 2026-09-23 20:41:18

#include<iostream>
using namespace std;

int main(){
    ios::sync_with_stdio(0);cin.tie(0);
    int arr[9];
    int count = 0;
    for(int i = 0;i<9;i++){
        cin >> arr[i];
    }
    for(int i = 0;i<9;i++){
        count = count + (arr[i]*(10-i));
    }
    if (count % 11 == 0){
        cout << "0";
    }else{
        cout << 11-(count%11);
    }
    return 0;
}