#include "islands.h"
#include<bits/stdc++.h>
#include <variant>
#include <vector>
using namespace std;
const int N = 100010;
vector <pair <int, int>> g[N];
std::variant<bool, std::vector<int>> find_journey(
int N, int M, std::vector<int> U, std::vector<int> V) {
for(int i = 0;i < M;i++){
g[U[i]].push_back({V[i], i});
}
if(g[0].size() < 2) return false;
if(g[1].size() < 1) return false;
int a = g[0][0].second, b = g[0][1].second, c = g[1][0].second;
vector <int> ans = {a, c, b, a, c, b};
return ans;
/*
if (N == 4) {
return std::vector<int>({0, 1, 2, 4, 0, 3, 2, 1, 4, 3});
}
return false;
*/
}
