Compilare: main.cpp: In function 'int dfs(int, int, int, std::vector<int>, std::vector<std::pair<int, int> >&, std::vector<std::vector<std::pair<int, int> > >&, std::vector<int>&)': main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i = 0; i < edg[node].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool solve()': main.cpp:42:41: warning: control reaches end of non-void function [-Wreturn-type] 42 | vector<vector<pair<int, int>>> edg(n); | ^