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#include <bits/stdc++.h>
using namespace std;
#define ll long long
const ll MOD = 1e9+7;
int main(){
  ll n;
  cin>>n;
  ll ans=1;
  for(ll i=1;i<=n;i++){
    ans=(2*ans)%MOD;
  }
  cout<<ans;
  return 0;
}