#include<bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
#define REP(i,n) for(int i = 0;i < (n);i++)
#define pb push_back

const int INF = 1e9;
 
const ll mod=1e9+7;
 
ll fact[200010];//階乗の値を保存
ll rfact[200010];//逆元の値を保存
 
ll mod_pow(ll x, ll p){
        ll res=1;
        while(p){
                if(p&1){
                        res=res*x%mod;
                }
                x=x*x%mod;
                p/=2;
        }
        return res;
}
 
ll nCr(ll n, ll r){
        return fact[n]*rfact[r]%mod*rfact[n-r]%mod;
}

int main(){
  fact[0]=1;
  rfact[0]=1;
  for(int i=1;i<200010;i++){
    fact[i]=i*fact[i-1]%mod;
    rfact[i]=mod_pow(fact[i], mod-2);
  }
  ll n;
  ll sum = 0;
  cin >> n;
  REP(i,n/2+1){
    ll a = nCr(n,i);
    if(a%2 == 0)
      sum++;
    
  }
  if(n%2 == 0 && n != 0)
    cout << (sum-1)*2+1 << endl;
  else if(n == 0)
    cout << 0 << endl;
  else
    cout << sum*2 << endl;
}