Compilare: user.cpp: In function ‘void fil(int, int, int)’: user.cpp:34:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h=0;h<l[-ok].size();h++) ^ user.cpp: In function ‘int bfs()’: user.cpp:59:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[nod].size();i++) ^ user.cpp:70:1: warning: control reaches end of non-void function [-Wreturn-type] } ^