Compilare: main.cpp: In function 'int main()': main.cpp:47:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for ( int j = 0 ; j < adj[i].size(); j ++ ) | ~~^~~~~~~~~~~~~~~ main.cpp:52:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int k = 0 ; k < adj[st].size(); k ++ ) | ~~^~~~~~~~~~~~~~~~