#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define dunk(n) cout << n << endl
#define all(a) (a).begin(),(a).end()
int main() {
    int n,ans = 0;
    cin >> n;
    rep(i,n){
        if(i%3 != 0 && i%5 != 0) ans++;
    }
}