#include "longesttrip.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
//#define int long long
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
#define sp << " " <<
#define all(x) x.begin(),x.end()
#define big(x) ((int)(x.size()))
using namespace std;
const int MOD = 1e9+7, LIM = 1e6+1, inf = 2e9;
int c[257][257];
int sor(int a,int b) {
if (c[a][b] != -1) return c[a][b];
if (c[b][a] != -1) return c[b][a];
if (a == b) return 0;
return c[a][b] = are_connected({a},{b});
}
std::vector<int> longest_trip(int N, int D)
{
memset(c,-1,sizeof c);
vi ans;
int iter = 50;
for (int i = 0;i<iter;i++) {
vi perm(N);
iota(all(perm),0ll);
shuffle(all(perm),mt19937(i));
vi have(N,0);
deque<int> mytrip;
mytrip.push_back(perm[0]);
have[perm[0]] = 1;
while (1) {
int fnd = 0;
for (int j = 0;j<N;j++) {
if (have[perm[j]]) continue;
if (sor(mytrip.front(),perm[j])) mytrip.push_front(perm[j]),have[perm[j]] = 1,fnd =1;
else if (sor(mytrip.back(),perm[j])) mytrip.push_back(perm[j]),have[perm[j]] = 1,fnd = 1;
}
if (!fnd) break;
}
vi v = vi(all(mytrip));
if (big(v) > big(ans)) ans = v;
}
return ans;
}
