Compilare: main.cpp: In member function 'void Heap::down(int)': main.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | while (nod * 2 < h.size()) { | ~~~~~~~~^~~~~~~~~~ main.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if (fiu + 1 < h.size() && v[h[fiu + 1]].a < v[h[fiu]].a) | ~~~~~~~~^~~~~~~~~~