#include <iostream>
using namespace std;
 
int num(int n);
 
int main(){
  int n;
  cin>>n;
  cout << num(n)/3650 + 1<<endl;
}
 
int num(int n){
    switch (n)
    {
        case -1: return 0;
        case 0:  return 0;
        case 1:  return 1;
    }
  return num(n-1)+num(n-2)+num(n-3);
}