Compilare: user.cpp: In function ‘int Find(int)’: user.cpp:24:10: warning: statement has no effect [-Wunused-value] for(x; daddy[x] != x; x = daddy[x]); ^ user.cpp: In function ‘int main()’: user.cpp:73:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < apm.size(); ++i) ~~^~~~~~~~~~~~