Compilare: main.cpp: In function 'void heapify(std::vector<int>&, int)': main.cpp:33:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if(left < heap.size() && heap[left] < heap[largest]) | ~~~~~^~~~~~~~~~~~~ main.cpp:38:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(right < heap.size() && heap[right] < heap[largest]) | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'void delete_element(std::vector<int>&, int)': main.cpp:64:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(i < heap.size() && heap[i] != key) | ~~^~~~~~~~~~~~~ main.cpp:69:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | if(i < heap.size()) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int searchVectorPairs(std::vector<std::pair<int, int> >, int)': main.cpp:81:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | while(i < v.size() && v[i].second != key) | ~~^~~~~~~~~~ main.cpp:86:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | if(i < v.size()) | ~~^~~~~~~~~~