#include "islands.h"
#include <variant>
#include <vector>
using namespace std;
#define pb push_back
variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
if(N==2){
// subtask 1
vector<int> bthere, bback;
for(int i=0; i<M; i++){
if(U[i]==0 && V[i]==1){
bthere.pb(i);
} else{
bback.pb(i);
}
}
if(bthere.size()>1 && bback.size()>1){
vector<int> answer = {bthere[0], bback[0], bthere[1], bback[1], bback[0], bthere[0], bback[1], bthere[1]};
return answer;
} else{
return false;
}
}
return false;
}
