Compilare: main.cpp: In constructor 'flow::flow(int, int, int)': main.cpp:15:17: warning: 'flow::n' will be initialized after [-Wreorder] 15 | int sr, tg, n; | ^ main.cpp:15:9: warning: 'int flow::sr' [-Wreorder] 15 | int sr, tg, n; | ^~ main.cpp:17:5: warning: when initialized here [-Wreorder] 17 | flow(int n, int s, int t) : n(n), sr(s), tg(t) { | ^~~~ main.cpp: In member function 'long long int flow::dfs(int, long long int)': main.cpp:31:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int& i = ptr[a]; i < adj[a].size(); i++) { | ~~^~~~~~~~~~~~~~~