#include "islands.h"
#include <variant>
#include <vector>
#include<bits/stdc++.h>
using namespace std;
#define ll int
std::variant<bool, std::vector<int>> find_journey( int N, int M, std::vector<int> U, std::vector<int> V) {
if(N==2)
{
vector<int> va,vb;
for(int i = 0; i < M; i++) if(U[i]==0)va.push_back(i); else vb.push_back(i);
if(va.size()>=2&&vb.size()>=1)
{
vector<int > ans;
ll a1 = va[0], a2 = va[1], b = vb[0];
return vector<int>({a1,b,a2,a1,b,a2});
}
else return false;
}
ll a1 , a2, b1 ,b2 , c1, c2;
for(int i = 0; i < M; i++)
{
if(U[i]==0&&V[i]==1) a1 = i;
if(U[i]==1&&V[i]==0) a2 = i;
if(U[i]==1&&V[i]==2) b1 = i;
if(U[i]==2&&V[i]==1) b2 = i;
if(U[i]==2&&V[i]==0) c1 = i;
if(U[i]==0&&V[i]==2) c2 = i;
}
return vector<int>({a1,b1,c1,c2,b2,a2,c1,b1,a1,a2,b2,c2});
}
