Compilare: main.cpp: In constructor 'Network::Network(int, int, int)': main.cpp:29:15: warning: 'Network::D' will be initialized after [-Wreorder] int n, S, D; ^ main.cpp:24:28: warning: 'std::vector<std::vector<int> > Network::adj' [-Wreorder] vector <vector <int> > adj; ^~~ main.cpp:31:2: warning: when initialized here [-Wreorder] Network(int n, int S, int D) : n(n), S(S), D(D), adj(n + 1), dist(n + 1, INF) {} ^~~~~~~ main.cpp: In member function 'int Network::get_cost()': main.cpp:167:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: At global scope: main.cpp:170:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^