Compilare: main.cpp: In function 'void balance_heap(std::vector<std::pair<int, int> >&, int)': main.cpp:22:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if(heap[i].first > heap[l].first and l < heap.size()) | ~~^~~~~~~~~~~~~ main.cpp:24:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(heap[i].first < heap[r].first and r < heap.size()) | ~~^~~~~~~~~~~~~