Compilare: main.cpp: In member function 'void Heap::down(int)': main.cpp:44:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 44 | if(heap.size() <= left){ | ~~~~~~~~~~~~^~~~~~~ main.cpp:48:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 48 | if(heap.size() <= right || heap[left] < heap[right]){ | ~~~~~~~~~~~~^~~~~~~~