Compilare: main.cpp: In function 'void popHeap()': main.cpp:30:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p * 2 < heap.size()){ ~~~~~~^~~~~~~~~~~~~ main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (p * 2 + 1 == heap.size() && heap[p] > heap[p * 2]){ ~~~~~~~~~~^~~~~~~~~~~~~~