Submission

Score: 90

User: onlyme910

Problemset: ISBN

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-08 20:35:11

#include <bits/stdc++.h>
using namespace std;

int main(){
    int arr[9];
    for(int i = 0;i < 9;i++){
        cin >> arr[i];
    }
    int sum =0,q =10;
    for(int i = 0;i<9;i++){
        sum += arr[i]*q;
        q--;
    }
    for(int j = 0;j<9;j++){
        if((sum+j)%11 == 0){
            cout << j;
            break;
        }
    }
}