Compilare: main.cpp: In member function 'void MaxFlow::add_edge(int, int, int)': main.cpp:21:55: warning: narrowing conversion of '((MaxFlow*)this)->MaxFlow::g[to].std::vector<edge>::size()' from 'std::vector<edge>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 21 | g[from].push_back(edge {to, cap, 0, g[to].size()}); | ~~~~~~~~~~^~ main.cpp:22:58: warning: narrowing conversion of '(((MaxFlow*)this)->MaxFlow::g[from].std::vector<edge>::size() - 1)' from 'std::vector<edge>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 22 | g[to].push_back(edge {from, 0, 0, g[from].size() - 1}); | ~~~~~~~~~~~~~~~^~~ main.cpp: In member function 'int MaxFlow::dfs(int, int, int)': main.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (; ptr[node] < g[node].size(); ptr[node]++) { | ~~~~~~~~~~^~~~~~~~~~~~~~~~ main.cpp:72:5: warning: control reaches end of non-void function [-Wreturn-type] 72 | } | ^