#include <iostream>
#include <vector>

using namespace std;

typedef double REAL;
typedef vector<REAL> VF;
typedef vector<VF> VVF;

int main (){

  while (true){

    // read input

    int n, m;
    scanf ("%d", &n);
    if (n == -1) break;
    m = 1<<n;

    VVF P (m, VF (m));
    for (int i = 0; i < m; i++)
      for (int j = 0; j < m; j++)
	scanf ("%lf", &P[i][j]);

    // Q[i][j] = probability that team j advances to the ith round

    VVF Q (n+1, VF(m, 0));
    Q[0] = VF(m, 1);
  
    for (int round = 1; round <= n; round++){
      for (int i = 0; i < m; i++){

	// consider all players that i might compete with

	int numopps = 1<<(round-1);
	int start = (((i>>(round-1))^1)<<(round-1));
	for (int j = start; j < start+numopps; j++)
	  Q[round][i] += Q[round-1][j] * P[i][j];
	Q[round][i] *= Q[round-1][i];
      }
    }

    int best = 0;
    for (int i = 0; i < m; i++){
      if (Q[n][i] > Q[n][best]) best = i;
    }

    cout << best+1 << endl;
  }

  return 0;
}