Compilare: main.cpp: In function 'void push(int)': main.cpp:34:42: warning: narrowing conversion of 'order_to_pos.std::vector<int>::size()' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing] 34 | heapp.push_back({x, order_to_pos.size()}); | ~~~~~~~~~~~~~~~~~^~ main.cpp: In function 'void heapify_down(int)': main.cpp:55:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | if(left < heapp.size() && heapp[left].value < heapp[index].value){ | ~~~~~^~~~~~~~~~~~~~ main.cpp:58:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Node>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | if(right < heapp.size() && heapp[right].value < heapp[min_index].value){ | ~~~~~~^~~~~~~~~~~~~~