Compilare: user.cpp: In function ‘int sterge(int, int)’: user.cpp:14:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<graf[nod].size(); i++) ^ user.cpp: In function ‘void euler(int)’: user.cpp:26:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graf[nod].size(); i++) ^ user.cpp: In function ‘int sterge(int, int)’: user.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type] } ^