#include <stdio.h>
#include <assert.h>

int contain7(int n) {
	while (n != 0) {
		if (n % 10 == 7 || n % 10 == -7) return 1;
		n = (n - n % 10) / 10;
	}
	return 0;
}

int main() {
	int n;
	scanf("%d", &n);

	assert(0 <= n);
	assert(n <= 1e9);
	assert(contain7(n));

	return 0;
}