Compilare: main.cpp: In function 'void del(int)': main.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(2 * position < heap.size()) ~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:37:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(2 * position + 1 >= heap.size() or heap[2 * position].value < heap[2 * position + 1].value) ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~