#include<stdio.h>
main()
{
	int a,b,c;
	scanf("%d",&a);
	if(a>10)
	{   b=375/120;
	    printf("%d",b+1);
    }
	else if(a>7)
	{  c=225/120;
	   printf("%d",c+1);
    }
	else if (a>3)
	printf("%d",120/75);
}
/**************************************************************
	Problem: 1310
	User: admin
	Language: C
	Result: Accepted
	Time:14 ms
	Memory:1144 kb
****************************************************************/