#include "islands.h" #include <bits/stdc++.h> using namespace std; #define pb push_back #define mp make_pair #define pii pair<int, int> #define fi first #define se second variant<bool, vector<int> > find_journey(int n, int m, vector<int> u, vector<int> v){ if (m<3)return false; vector<int> a, b; int c=0; for (int i=0; i<m; ++i){ if (!u[i])++c; if (v[i])a.pb(i); else b.pb(i); } if (a.empty()||b.empty())return false; if (c>=2)return vector<int>{}; return false; }