Compilare: main.cpp: In member function 'int DinicFlow::bfs()': main.cpp:31:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int it = 0; it < q.size(); ++it ) { ~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:82:15: warning: unused variable 'S' [-Wunused-variable] int N, M, S, D; ^ main.cpp:82:18: warning: unused variable 'D' [-Wunused-variable] int N, M, S, D; ^