#define _CRT_SECURE_NO_WARNINGS
#include "longesttrip.h"
#include <iostream>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <sstream>
#include <map>
#include <stack>
#include <set>
#include <queue>
#include <deque>
#include <unordered_set>
#include <unordered_map>
#include <math.h>
#include <cmath>
#include <vector>
#include <iomanip>
#include <random>
#include <chrono>
#include <bitset>
#include <cassert>
using namespace std;
#define ll long long
#define fr first
#define sc second
#define pb push_back
#define US freopen(".in", "r", stdin); freopen(".out", "w", stdout);
ll gcd(ll a, ll b)
{
if (a == 0 || b == 0) {
return max(a, b);
}
if (a <= b) {
return gcd(a, b % a);
}
else {
return gcd(a % b, b);
}
}
ll lcm(ll a, ll b) {
return (a / gcd(a, b)) * b;
}
const int N = 500005;
const ll oo = 1000000000000000000, MOD = 1000000007;
vector<int> patas, g[N];
bool ok[N];
void dfs(int u) {
ok[u] = 1;
patas.pb(u);
for (int num : g[u]) {
if (ok[num] == 0) {
dfs(num);
break;
}
}
}
std::vector<int> longest_trip(int N, int D)
{
int n = N, d = D;
for (int i = 0; i < n; ++i) {
ok[i] = 0;
g[i].clear();
}
patas.clear();
vector<int> vec;
if (d == 3) {
for (int i = 0; i < n; ++i) {
vec.pb(i);
}
return vec;
}
int sk1 = 0, mx = 0;
int mn = n * n + 3;
vector<int> hnaravora;
for (int i = 0; i < n; ++i) {
for (int j = i + 1; j < n; ++j) {
if (are_connected({ i }, { j }) == 1) {
g[i].pb(j);
g[j].pb(i);
mx = max(mx, (int)g[i].size());
mx = max(mx, (int)g[j].size());
mn = min(mx, (int)g[i].size());
mn = min(mx, (int)g[j].size());
}
else {
if (hnaravora.size() == 0) {
hnaravora.pb(i);
}
}
}
}
vector<pair<int, int>> sortav;
for (int i = 0; i < n; ++i) {
sortav.pb({ g[i].size(),i });
}
sort(sortav.begin(), sortav.end());
for (int i = 0; i < 100; ++i) {
int ind = rand() % (n-1) + 1;
hnaravora.pb(sortav[ind].sc);
}
hnaravora.pb(sortav[0].sc);
hnaravora.pb(sortav.back().sc);
for (int i = hnaravora.size()-1; i >= 0; --i) {
for (int j = 0; j <= n; ++j) {
ok[j] = 0;
}
patas.clear();
dfs(hnaravora[i]);
if (patas.size() > vec.size()) {
vec.clear();
vec = patas;
}
}
return vec;
}
