Submission

Score: 100

User: theem1502

Problemset: ISBN

Language: c

Time: 0.002 second

Submitted On: 2025-09-21 08:31:11

#include <stdio.h>

int main() {

    int num[9];
    for (int i = 0; i < 9; i++) {
        scanf("%d", &num[i]);
    }
    int realnum = 0;
    realnum += 10 * (num[0]);
    realnum += 9 * (num[1]);
    realnum += 8 * (num[2]);
    realnum += 7 * (num[3]);
    realnum += 6 * (num[4]);
    realnum += 5 * (num[5]);
    realnum += 4 * (num[6]);
    realnum += 3 * (num[7]);
    realnum += 2 * (num[8]);

    int well = realnum % 11;
    if (well == 0) {
        printf("%d", 0);
        return 0;
    }
    
    printf("%d", 11 - well);

}