#include <stdio.h>
#include <stdbool.h>

bool divisible15(unsigned int x)
{
    //286331153 = (2^32 - 1) / 15
    //4008636143 = (2^32) - 286331153
    return x * 4008636143 <= 286331153;
}

int main(void) {
	printf("%d\n", divisible15(15));
	return 0;
}