Compilare: user.cpp: In function ‘int cuplaj(int)’: user.cpp:36:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].size();++i) ^ user.cpp:47:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].size();++i) ^ user.cpp: In function ‘void match(int)’: user.cpp:63:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<G[nod].size();++i) ^