Compilare: main.cpp: In function 'void heapify(int)': main.cpp:22:11: 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(st < heap.size() && heap[st].second < heap[mn].second) | ~~~^~~~~~~~~~~~~ main.cpp:24:11: 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(dr < heap.size() && heap[dr].second < heap[mn].second) | ~~~^~~~~~~~~~~~~ main.cpp: In function 'void sterge(int)': main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i = 0; i < heap.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:56:13: warning: 'poz' may be used uninitialized in this function [-Wmaybe-uninitialized] 56 | heap[poz] = u; | ^