#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;


int main(){
    int n, t, c, r, r1, cnt;
    cin >> n;
    for (int i = 0; i <= n/5; i++){
        t = i;
        r = n - i*5;
        for (int j = 0; j <= r/3; j++){
            r1 = r - j*3;
            if (!(r1%2) && r1/2 <= t) cnt++;
        }
    }
    cout << cnt << endl;
}