Compilare: user.cpp: In function ‘void HPdown(int)’: user.cpp:44:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( !FINHP && 2*i < HEAP.size() ){ ^ user.cpp:53:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( 2*i+ 1 <HEAP.size() && HEAP [ i ] > HEAP [2*i + 1 ] && HEAP [ 2*i + 1] < HEAP [ 2*i ] ){ ^ user.cpp: In instantiation of ‘void pushHP(T) [with T = int]’: user.cpp:94:24: required from here user.cpp:31:9: warning: unused variable ‘POS_aux’ [-Wunused-variable] int POS_aux, NTH_aux; ^ user.cpp:31:18: warning: unused variable ‘NTH_aux’ [-Wunused-variable] int POS_aux, NTH_aux; ^