Compilare: main.cpp: In function 'void down(int)': main.cpp:31:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | while(2*pos < heap.size()) | ~~~~~~^~~~~~~~~~~~~ main.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if(2*pos+1 < heap.size() && v[heap[2*pos]] > v[heap[2*pos+1]]) | ~~~~~~~~^~~~~~~~~~~~~