Submission

Score: 0

User: 8ii8jj

Problemset: ตรวจบัตรเครดิต

Language: c

Time: 0.002 second

Submitted On: 2025-10-07 19:37:32

#include <stdio.h>

int main(){
    char a[16];
    scanf("%s",a);
    int b=0;
    for (int i=0;i<15;i++){
        if(i%2==0){
            if((a[i]-48)*2>9){
                b+=(a[i]-48)*2%10+1;
            }
            else{
                b+=(a[i]-48)*2;
            }
        }
        else{
            b+=a[i]-48;
        }
    }
    if(10-(b%10)==a[15]-48){
        printf("yes");
    }
    else{
        printf("no");
    }
}