Compilare: main.cpp: In member function 'void Heap::goDOWN(int)': main.cpp:40:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(node * 2 < heap.size() && heap[node] > heap[node * 2]) ~~~~~~~~~^~~~~~~~~~~~~ main.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(node * 2 + 1 < heap.size() && heap[node] > heap[node * 2 + 1]) ~~~~~~~~~~~~~^~~~~~~~~~~~~