Compilare: user.cpp: In function ‘void process_apm(int)’: user.cpp:50:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (h=0;h<apm.size() && siz_arb<=nodes-1;h++) ^ user.cpp: In function ‘int find_parent(int)’: user.cpp:23:1: warning: control reaches end of non-void function [-Wreturn-type] } ^