#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
#define pb push_back
const int N=1050;
vector<int> E[N];
void AddEdge(int u,int v){E[u].pb(v),E[v].pb(u);}
bool was[N];
vector<int> Euler;
void DFS(int u){
was[u]=true,Euler.pb(u);
for(int v:g[u])if(!was[v]&&p[u][v]==1)DFS(v);
}
void DFS1(int u){
was[u]=true,Euler.pb(u);
for(int v:g[u])if(!was[v]&&p[u][v]==2)DFS1(v);
}
int construct(vector<vector<int>> p){
int n=(int)p.size();
for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(p[i][j]==3)return 0;
for(int i=0;i<n;i++)for(int j=i;j<n;j++)if(p[i][j]>0)AddEdge(i,j);
bool one=true,two=true;
for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(p[i][j]==1)two=false;
for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(p[i][j]==2)one=false;
vector<vector<int>> ans(n,vector<int>(n,0));
vector<int> root;
for(int i=0;i<n;i++){
if(!was[i]){
DFS(i);
if(one){
for(int x:Euler)for(int y:Euler)if(x!=y&&p[x][y]==0)return 0;
}
root.pb(i);
for(int j=1;j<(int)Euler.size();j++){
int x=Euler[j],y=Euler[j-1];
ans[x][y]=ans[y][x]=1;
}
Euler.clear();
}
}
for(int i=0;i<n;i++)was[i]=false;
for(int i=0;i<n;i++)for(int j=0;j<n;j++){
if(!was[i]){
DFS1(i);
if((int)Euler.size()==2)return 0;
for(int i=1;i<(int)Euler.size();i++){
int x=Euler[i],y=Euler[i-1];
ans[x][y]=ans[y][x]=1;
}
if((int)Euler.size()>2){
int x=Euler[0],y=Euler.back();
ans[x][y]=ans[y][x]=1;
}
Euler.clear();
}
}
build(ans);
return 1;
}
Compilation message
supertrees.cpp: In function 'void DFS(int)':
supertrees.cpp:12:12: error: 'g' was not declared in this scope
12 | for(int v:g[u])if(!was[v]&&p[u][v]==1)DFS(v);
| ^
supertrees.cpp:12:29: error: 'p' was not declared in this scope
12 | for(int v:g[u])if(!was[v]&&p[u][v]==1)DFS(v);
| ^
supertrees.cpp: In function 'void DFS1(int)':
supertrees.cpp:16:12: error: 'g' was not declared in this scope
16 | for(int v:g[u])if(!was[v]&&p[u][v]==2)DFS1(v);
| ^
supertrees.cpp:16:29: error: 'p' was not declared in this scope
16 | for(int v:g[u])if(!was[v]&&p[u][v]==2)DFS1(v);
| ^
