Compilare: main.cpp: In function 'void delete_element(std::vector<std::pair<int, int> >&, int)': main.cpp:37:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while((2*i < h.size() && h[i].first > h[2*i].first) || (2*i+1 < h.size() && h[i].first > h[2*i+1].first)){ | ~~~~^~~~~~~~~~ main.cpp:37:67: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while((2*i < h.size() && h[i].first > h[2*i].first) || (2*i+1 < h.size() && h[i].first > h[2*i+1].first)){ | ~~~~~~^~~~~~~~~~ main.cpp:38:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(2*i+1 >= h.size() || h[2*i + 1].first > h[2*i].first){ | ~~~~~~^~~~~~~~~~~