Compilare: user.cpp: In function ‘void nivel3(int, int)’: user.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[nod].size();i++) ^ user.cpp: In function ‘void calcmin()’: user.cpp:58:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[nod].size();i++) ^ user.cpp: In function ‘void calcmax()’: user.cpp:73:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gr[nod].size();i++) ^