Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:11:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'bool cuplaj(int)': main.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<usu[nod].size();++i) ~^~~~~~~~~~~~~~~~ main.cpp:35:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<usu[nod].size();++i) ~^~~~~~~~~~~~~~~~