#include <cstdio>
#include <iostream>
#include <vector>
typedef long long ll;
typedef unsigned long long ull;
#define REP(i,a,b) for(ll (i)=a;(i)<(ll)(b);++(i))
#define rep(i,n) REP(i,0,n)
using namespace std;
const ull cycle_per_sec = 2800000000;
ull begin_cycle;
ull get_cycle(){
	unsigned int low, high;
	__asm__ volatile ("rdtsc" : "=a" (low), "=d" (high));
	return ((ull) low) | ((ull) high << 32);
}
double get_time(){
	return (double) (get_cycle() - begin_cycle)/cycle_per_sec;
}

int rec(int x){
	if(x<=0) return 0;
	else return rec(x-1)+rec(x-1);
}

int main(){
	begin_cycle = get_cycle();
	int n;
	cin>>n;
	rec(n*5+4);
	cout<<0<<endl;
	double t = get_time();
	cerr<<t<<endl;
	return 0;
}