#include<iostream>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int w,jh[1200];
inline void work(int y)
{
	for(int i=1;i<=1000;i++) jh[i]=1;
	for(int i=2;i<=1000;i++)
	{
		int t=floor(i/2);
		for(int j=1;j<=t;j++)
		{
			jh[i]+=jh[j];
		}
	}
	printf("%d",jh[y]);
	return;
}
inline int MAIN()
{
	freopen("nums.in","r",stdin);
	freopen("nums.out","w",stdout);
	scanf("%d",&w);
	work(w);
	return 0;
}
int main()
{;
}
int swttc=MAIN();