#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
int father1[1010], father[1010];
int find1(int x){
if(father1[x]==x)return x;
return father1[x] = find1(father1[x]);
}
int find2(int x){
if(father[x]==x)return x;
return father[x] = find2(father[x]);
}
int construct(std::vector<std::vector<int>> p) {
int n = p.size(), i, j;
for(i=0;i<n;i++)father[i] = father1[i] = i;
std::vector<std::vector<int>> answer = p;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
answer[i][j] = 0;
for(i=0;i<n;i++)
for(j=0;j<n;j++){
if(p[i][j]==3 || (i==j && p[i][j]!=1) || (p[i][j]!=p[j][i]))
return 0;
if(p[i][j]>0)
father1[find1(i)] = find1(j);
else
if(find1(i)==find2(j))return 0;
if(p[i][j]==1 && find2(i)!=find2(j)){
father[find2(i)] = find2(j);
answer[i][j] = answer[j][i] = 1;
}
}
build(answer);
return 1;
}
