#include<stdio.h>
int main()
{
    int N,I,sum;
    sum=0;
    I=1;
    //1<=N<=1000
    scanf("%d",&N);
    while(I<=N)
    {
     if((I%2==0||I%3==0)||(I%5==0))
     {
            sum++;
		}
        I++;
    }
printf("%d",sum);
return 0;
}