why this code is giving a time limit exceeded problem?

#include <stdio.h>

int main()
{
    long long int n;
    long long int k;
    long long int a[1000000];
    int i;
    int count;
    count = 0;
    scanf("%lld", &n);
    scanf("%lld", &k);
    for(i = 0; i < n; i++) {
        scanf("%lld", &a[i]);
        }
    for(i = 0; i < n; i++) {
        if (a[i]%k == 0)
            count++;
    }
    printf("%d\n", count);

    return 0;
}