Compilare: main.cpp: In member function 'int MaxFlow::dfs(int, int)': main.cpp:106:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for(int &i = ptr[node] ; i < e[node].size() ; i++) | ~~^~~~~~~~~~~~~~~~