Compilare: main.cpp: In function 'void heapify(std::vector<int>&, int)': main.cpp:34:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if(left < heap.size() && heap[left] < heap[largest]) | ~~~~~^~~~~~~~~~~~~ main.cpp:39:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if(right < heap.size() && heap[right] < heap[largest]) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'void delete_element(std::vector<int>&, int)': main.cpp:65:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | while(i < heap.size() && heap[i] != key) | ~~^~~~~~~~~~~~~ main.cpp:70:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | if(i < heap.size()) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for(int i = 0; i < operation_map.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~