//#pragma GCC target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl")
#pragma GCC target("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define LL long long
#define DB double
#define LD long double
#define ST string
#define BS bitset
#define PA pair<LL,LL>
#define VE vector
#define VL VE<LL>
#define VP VE<PA>
#define VVL VE<VL>
#define VVVL VE<VVL>
#define PQ priority_queue
#define PQS priority_queue<LL,vector<LL>,greater<LL>>
#define FI first
#define SE second
#define PB push_back
#define POB pop_back
#define PF push_front
#define POF pop_front
#define MP make_pair
#define TS to_string
#define TU to_ullong
#define BPL __builtin_popcountll
#define FOR(i,a,n) for(i=a;i<n;++i)
#define FORR(i,a,n) for(i=n-1;i>=a;--i)
#define rep(i,n) FOR(i,0,n)
#define repr(i,n) FORR(i,0,n)
#define ALL(a) a.begin(),a.end()
#define RALL(a) a.rbegin(),a.rend()
#define SORT(a) sort(ALL(a))
#define REV(a) reverse(ALL(a))
#define UB(a,n) *upper_bound(ALL(a),n)
#define UBn(a,n) upper_bound(ALL(a),n)-a.begin()
#define LB(a,n) *lower_bound(ALL(a),n)
#define LBn(a,n) lower_bound(ALL(a),n)-a.begin()
#define INF 1000000000000000003
#define PI 3.14159265358979323846264338327950288
#define MOD 1000000007
//#define MOD 998244353
#define ERR 1e-10
#define coutl cout<<fixed<<setprecision(15)
#define FAST cin.tie(0);ios::sync_with_stdio(false)

void Yn(LL a){if(a)printf("Yes\n");else printf("No\n");}
void YN(LL a){if(a)printf("YES\n");else printf("NO\n");}
void vout(VL &v){LL i;rep(i,v.size()){printf("%lld",v[i]);if(i<v.size()-1)printf(" ");}printf("\n");}
void v2out(VVL &v){LL i;rep(i,v.size())vout(v[i]);}
LL pwmn(LL a,LL n){LL ans=1;while(ans<a)ans*=n;return ans;}
LL dig(LL n){LL ret=0;while(n)n/=10,++ret;return ret;}
LL GCD(LL a,LL b){LL c=1,tmp=max(a,b);b=min(a,b);a=tmp;while(c!=0){c=a%b;a=b;b=c;}return a;}
LL LCM(LL a,LL b){return a*b/GCD(a,b);}
LL cmod(LL a,LL m){if(a%m<0)return a%m+abs(m);else return a%m;}
LL DIV(LL a,LL d,LL m){LL l=m,x=1,y=0,k;while(l){k=d/l;d-=k*l;swap(l,d);x-=k*y;swap(x,y);}return cmod(a*cmod(x,m),m);}
LL POW(LL a,LL n,LL m){LL ans=1;while(n>0){if(n&1)ans=ans*a%m;a=a*a%m;n>>=1;}return ans;}
VL fact,finv,inv;
void comi(LL n){LL i;fact.resize(max(2LL,n+1));finv.resize(max(2LL,n+1));inv.resize(max(2LL,n+1));fact[0]=fact[1]=1;finv[0]=finv[1]=1;inv[1]=1;FOR(i,2,n+1){fact[i]=fact[i-1]*i%MOD;inv[i]=MOD-inv[MOD%i]*(MOD/i)%MOD;finv[i]=finv[i-1]*inv[i]%MOD;}}
LL com(LL n,LL k){if(n<k||n<0||k<0)return 0;return fact[n]*(finv[k]*finv[n-k]%MOD)%MOD;}
bool cmps(PA a,PA b){if(a.SE!=b.SE)return a.SE<b.SE;return a.FI<b.FI;}
template<typename T>bool chmax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<typename T>bool chmin(T &a,T b){if(a>b){a=b;return true;}return false;}

int main(){
    FAST;
    LL i,ans=0,N,k=1,a=0,b=0,c,d;
    cin>>N;
    rep(i,N)k*=2;
    VL A(k);
    rep(i,k)cin>>A[i];
    rep(i,k/2){
        if(chmax(a,A[i]))c=i;
        if(chmax(b,A[k/2+i]))d=k/2+i;
    }
    if(a>b)cout<<d+1<<endl;
    else cout<<c+1<<endl;
}

/*--ILRS-- sr4saurabh  */
#include <bits/stdc++.h>
using namespace std; 
typedef long long int ll;
#define pb push_back 
#define popb pop_back
#define mp make_pair
#define ve vector
#define vii vector < int >
#define vll vector < ll > 
#define pii pair < int , int >
#define pll pair < ll , ll >
#define vpl vector < pll >
#define fi first
#define sz size 
#define len length 
#define se second 
//const ll mod=998244353;
const ll mod = 1000000000+7;
const ll N=10000000+6;
#define M_PI           3.14159265358979323846
//--------------------------------------------



//--------------------------------------------
ll ret_sum(ll sum , ll ma)
{
	if(sum < 2)
		return 0;
	if(sum > 2*ma)
		return 0;
	ll numways = 0;

	ma = min(ma , sum-1);

	if(sum & 1)
	{
		ll f1 = sum/2;
		ll f2 = f1 + 1;
		ll sub = sum - ma - 1;
		ll ans = f1 - sub;
		if(ans < 0)
			numways = 0;
		else
			numways = 2*ans;
	}
	else
	{
		ll f1 = sum/2;
		ll f2 = f1;
		ll sub = sum - ma - 1;
		ll ans = f1 - sub;
		if(ans < 0)
			numways = 0;
		else
			numways = 2*ans - 1;
	}

	return numways;
}




//============================================
int main() {
    ios::sync_with_stdio(false);
     cin.tie(0);
     cout.tie(0);
    #ifndef ONLINE_JUDGE
       freopen ("INPUT.txt" , "r" , stdin);
       freopen ("OUTPUT.txt", "w" , stdout);
    #endif

	//Never let somebody tell you - you are weak! You are as strong as anyone be,
       // u just need consistency and will power to change!


  

       	ll n,k;
       	cin>>n>>k;

      	ll ans = 0;
      	for(int i = 1; i <= 2*n ; i++)
      	{
      		ll r = ret_sum(i , n);
      		ll f = ret_sum(i-k,n);
      		ans = ans + r*f;
      	}

      	cout<<ans<<'\n';

       

       
        









return 0;
} 