Compilare: main.cpp: In member function 'void Heap::erase(int)': main.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | while(2*p+1 < heap.size()){ | ~~~~~~^~~~~~~~~~~~~ main.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if(2*p+2 < heap.size() && heap[2*p+1].first >= heap[2*p+2].first){ | ~~~~~~^~~~~~~~~~~~~