Compilare: main.cpp: In member function 'void MinHeap::heapify_down(int)': main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if (left < heap.size() && heap[left] < heap[smallest]) { | ~~~~~^~~~~~~~~~~~~ main.cpp:33:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if (right < heap.size() && heap[right] < heap[smallest]) { | ~~~~~~^~~~~~~~~~~~~