Compilare: main.cpp: In function 'void print_heap(int, std::__cxx11::string, bool)': main.cpp:53:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(node>heap_size) ~~~~^~~~~~~~~~ main.cpp: In function 'void shift(int)': main.cpp:70:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(left<=heap_size){ ~~~~^~~~~~~~~~~ main.cpp:72:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(right<=heap_size && heap[right]<heap[left]){ ~~~~~^~~~~~~~~~~