This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
const int NN=1e3+100;
bool vis[NN];
vector<int> g[NN][3];
vector<vector<int>> ans;
int s,e;
void dfs2(int u)
{
vis[u]=1;
for(auto x:g[u][1]){
if(vis[x])continue;
ans[u][x]=1;
ans[x][u]=1;
dfs2(x);
}
}
void dfs(int u)
{
e=u;
vis[u]=1;
for(auto x:g[u][2]){
if(vis[x])continue;
ans[u][x]=1;
ans[x][u]=1;
dfs(x);
}
}
int construct(vector<vector<int>> p){
int n=p.size();
ans.resize(n);
for(int i=0;i<n;i++){
ans[i].resize(n);
for(int j=0;j<n;j++){
if(p[i][j]==3){
return 0;
}
if(i==j){
if(p[i][j]!=1){
return 0;
}
continue;
}
g[i][p[i][j]].push_back(j);
g[j][p[i][j]].push_back(i);
}
}
for(int i=0;i<n;i++){
if(vis[i]==0)dfs2(i);
}
memset(vis,0,sizeof(vis));
for(int i=0;i<n;i++){
s=i;
e=i;
ans[s][e]=1;
if(vis[i]==0)dfs(i);
ans[i][i]=0;
}
build(ans);
return 1;
}
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