Compilare: user.cpp: In function ‘int Find(int)’: user.cpp:20:10: warning: statement has no effect [-Wunused-value] for(x; x != gr[x]; x = gr[x]); ^ user.cpp:19:16: warning: variable ‘aux’ set but not used [-Wunused-but-set-variable] int y = x, aux; ^ user.cpp: In function ‘int main()’: user.cpp:62:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++i) ^