#include <stdio.h>

int main(void) {
	int a=100;
	int b,c,d;
	int count=0;
	while(a<1000){
	b=a/100;
	c=(a/10)%10;
	d=a%10;
		if((b+c+d)%7==0){
			count++;
		}
		a++;
	}
	printf("%d",count);
	return 0;
}