Compilare: main.cpp: In instantiation of 'void Heap<T>::pop() [with T = std::pair<int, int>]': main.cpp:89:23: required from here main.cpp:57:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | if(st < v.size() && v[st] < v[mxi]) mxi = st; | ~~~^~~~~~~~~~ main.cpp:59:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int>, std::allocator<std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if(dr < v.size() && v[dr] < v[mxi]) mxi = dr; | ~~~^~~~~~~~~~