Submission

Score: 100

User: bbcctxp

Problemset: ISBN

Language: c

Time: 0.003 second

Submitted On: 2025-10-11 09:51:33

//c1_su66_isbn
#include <stdio.h>
#include <string.h>

int main(){
    int n[9];
    for(int i=0;i<9;i++)
        scanf("%d",&n[i]);

    int sum=0,j=10;
    for(int i=0;i<9;i++){
        sum+=n[i]*j;
        j--;
    }

    for(int i=0;i<11;i++){
        if((sum+i)%11==0)
        printf("%d",i);
    }


    return 0;
}

// [ 10n1 + 9n2 + 8n3 + 7n4 + 6n5 + 5n6 + 4n7 + 3n8 + 2n9 + n10 ]%11==0