Compilare: main.cpp: In member function 'void Heap::heapify_down(int)': main.cpp:62:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | if (left_child < h.size() && h[left_child] < h[small]) | ~~~~~~~~~~~^~~~~~~~~~ main.cpp:67:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | if (right_child < h.size() && h[right_child] < h[small]) | ~~~~~~~~~~~~^~~~~~~~~~ main.cpp: In member function 'void Heap::del(int)': main.cpp:97:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | if (index <= h.size() - 1) | ~~~~~~^~~~~~~~~~~~~~~ main.cpp:90:6: warning: unused variable 'x' [-Wunused-variable] 90 | int x = h[index]; | ^