Compilare: main.cpp: In function 'bool bfs()': main.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[node].size(); ++i) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:9: warning: unused variable 'x' [-Wunused-variable] int x, y, capacity, flux_min; ^ main.cpp:41:12: warning: unused variable 'y' [-Wunused-variable] int x, y, capacity, flux_min; ^ main.cpp:41:15: warning: unused variable 'capacity' [-Wunused-variable] int x, y, capacity, flux_min; ^~~~~~~~