#include "worldmap.h"
#include<bits/stdc++.h>
using namespace std;
int n, cnt=0, glob_diag=0;
vector<int> vis;
vector<vector<int>> ans, adj;
void fill(int d, int v) {
for (int x = 0; x < 2*n; x++) {
if (0<=d-x && d-x<2*n) ans[x][d-x]=v;
}
}
void dfs(int u) {
vis[u]=++cnt;
int diag = glob_diag + 1;
glob_diag += 3;
fill(diag - 1, u);
fill(diag, u);
fill(diag + 1, u);
int x=max(0, diag-2*n+1);
for (int v : adj[u]) {
if (!vis[v]) {
dfs(v);
fill(glob_diag++, u);
} else if (vis[v]<vis[u]) {
ans.at(x).at(diag-x)=v;
++x;
}
}
}
vector<vector<int>> create_map(int N, int M, vector<int> A, vector<int> B) {
n=N; cnt=0; glob_diag=0;
ans.assign(2*N, vector<int>(2*N, 1));
adj.assign(N+1, vector<int>());
vis.assign(N+1, 0);
for (int i = 0; i < M; ++i) {
adj[A[i]].push_back(B[i]);
adj[B[i]].push_back(A[i]);
} dfs(1);
return ans;
}
