Compilare: main.cpp: In member function 'void Heap::heapify_down(int)': main.cpp:61:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | if (left_child < h.size() && h[left_child] < h[small]) | ~~~~~~~~~~~^~~~~~~~~~ main.cpp:66:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | if (right_child < h.size() && h[right_child] < h[small]) | ~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In member function 'void Heap::del(int)': main.cpp:96:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | if (index <= h.size() - 1) | ~~~~~~^~~~~~~~~~~~~~~ main.cpp:89:6: warning: unused variable 'x' [-Wunused-variable] 89 | int x = h[index]; | ^