#include "worldmap.h"
#include <vector>
#include <algorithm>
#include <cstdio>
#include <cassert>
#include <iostream>
#define pb push_back
using namespace std;
const int MX = 1005;
vector <int> v[MX], be[MX], de[MX];
vector <int> ord;
void dfs(int a, int p, vector<int> &fix) {
fix[a] = 1;
ord.pb(a);
for (int to : v[a]) {
if (to == p) continue;
// if (fix[to]) {
// be[a].pb(to);
// } else {
// de[a].pb(to);
// }
dfs(to, a, fix);
}
if (p != 0 && v[a].size() != 1) {
ord.pb(a);
}
}
std::vector<std::vector<int>> create_map(int N, int M, std::vector<int> A, std::vector<int> B) {
int n = N;
ord.clear();
for (int i = 0; i < N; i++) {
v[i].clear();
be[i].clear();
de[i].clear();
}
for (int i = 0; i < M; i++) {
v[A[i]].push_back(B[i]);
v[B[i]].push_back(A[i]);
}
vector <int> fix(n, 0);
dfs(1, 0, fix);
vector <vector<int>> ans;
for (int i = 0; i < ord.size(); i++) {
vector <int> vec;
for (int j = 0; j < ord.size(); j++) {
vec.pb(ord[i]);
}
ans.pb(vec);
}
return ans;
}
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