Submission

Score: 95

User: APNICHANAN

Problemset: ISBN

Language: c

Time: 0.003 second

Submitted On: 2025-09-28 19:27:20

#include <stdio.h>
int main()
{
    int isbn[9], sum = 0;
    for (int i = 0; i < 9; i++)
    {
        scanf("%d", &isbn[i]);
        sum += isbn[i] * (10 - i);
    }
    for (int i = 0; i < 10; i++)
    {
        if ((sum + i) % 11 == 0)
        {
            printf("%d", i);
            return 0;
        }
    }
}