#include<bits/stdc++.h> using namespace std; int main(){ int n; int a[1100]; cin>>n; a[1]=1; a[2]=2; for(int i=3;i<=n;i++) { if(i%2==0) a[i]=a[i-1]+a[i/2]; else a[i]=a[i-1]; } cout<<a[n]<<endl; return 0; }