Compilare: user.cpp: In function ‘bool BFS()’: user.cpp:48:9: warning: unused variable ‘i’ [-Wunused-variable] int i, nod, fiu, l; ^ user.cpp:48:22: warning: unused variable ‘l’ [-Wunused-variable] int i, nod, fiu, l; ^ user.cpp: In function ‘void scrie()’: user.cpp:110:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) g << sol[i].first << ' ' << sol[i].second << '\n'; ^