Compilare: main.cpp: In member function 'void Heap::showHeap()': main.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(int i=0; i<this->values.size(); i++){ | ~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Heap::heapify(int)': main.cpp:45:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while (2 * i + 2 < this->values.size()) { | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~