// Subtask 3
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1000;
bool visited[N];
int construct(vector<vector<int>> p)
{
int n = p.size();
vector<vector<int>> ans(n, vector<int> (n, 0));
vector<int> connectedList[n];
for (int i=0 ; i<n ; i++) for (int j=0 ; j<n ; j++) if (i == j || p[i][j] == 2) connectedList[i].push_back(j);
for (int i=0 ; i<n ; i++) if (connectedList[i].size() == 2) return 0;
for (int i=0 ; i<n ; i++) for (int j=0 ; j<n ; j++) if (p[i][j] == 2 && connectedList[i] != connectedList[j]) return 0;
for (int i=0 ; i<n ; i++) if (!visited[i] && connectedList[i].size() > 1)
{
int prv = connectedList[i].back();
for (int cur : connectedList[i])
{
visited[cur] = true;
ans[prv][cur] = ans[cur][prv] = 1;
prv = cur;
}
}
build(ans);
return 1;
}
