#include<bits/stdc++.h>
using namespace std;
#define ll long long 
ll n,mx=LONG_LONG_MIN,l;
int main(){
	ios_base::sync_with_stdio(0);
	cout.tie(0);
	cin.tie(0);
	freopen("game.in","r",stdin);
	freopen("game.out","w",stdout);
	
	cin>>n;
	ll m=1;
	for(ll i=1;i<=n;i++){
		m*=2;
	}
	n=m;
	for(ll i=1;i<=n;i++){
		ll x;
		cin>>x;
		ll p=mx;
		mx=max(mx,x);
		if(mx!=p){
			l=i;
		}
	}
	cout<<l;
	return 0;
}