#include <iostream>
using namespace std;
int n, ans, v[1001];
int f(int x)
{
	if(v[x])
		return v[x];
	v[x] = 1;
	for(int i = 1; i <= x / 2; i ++)
		v[x] += f(i);
	return v[x];
}
int main()
{
	cin >> n;
	cout << f(n) << endl;
	return 0;
}