Compilare: main.cpp: In function 'int BFS(int)': main.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[c].size();i++) ~^~~~~~~~~~~~ main.cpp:36:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[c].size();i++) ~^~~~~~~~~~~~ main.cpp:44:6: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int main()': main.cpp:46:12: warning: variable 'nod' set but not used [-Wunused-but-set-variable] {int i,x,y,nod; ^~~ main.cpp: In function 'int BFS(int)': main.cpp:13:13: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] int i,c; ^