// This file is a "Hello, world!" in C++ language by GCC for wandbox.
#include <iostream>
#include <cstdlib>
using namespace std;
int main() {
	int N, T = 5, G = 2, PG = 3;
	cin >> N;
	int num = 0;
	for (int i = 0; i <= N; ++i) {
		for (int j = 0; j <= i; ++j) {
			for (int k = 0; k <= N; ++k) {
				if (((i*T) + (j*G) + (k*PG)) == N) {
					++num;
				}
			}
		}
	}
	cout << num << endl;
}