Submission

Score: 0

User: faofao

Problemset: ISBN

Language: cpp

Time: 0.002 second

Submitted On: 2025-10-13 09:22:14

#include <iostream>
using namespace std;

int main(){
    string s ; cin >> s ;
    int sum=0 ;
    for(int i=0 , l=10 ; i<s.length() ; i++ ,l--){
        int q = s[i] - '0';
        sum+= q*l ;
    }
    
    for(int i=0 ; i<11 ; i++){
        if((i+sum)%11==0){
            cout << i ;
            return 0;
        }
    }
}