Compilare: main.cpp: In function 'int bfs(int)': main.cpp:19:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[aux].size(); ++i) ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int dist()': main.cpp:43:13: warning: variable 'f2' set but not used [-Wunused-but-set-variable] int f1, f2; ^~