Compilare: main.cpp: In function 'void down(int)': main.cpp:33:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<nod>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 33 | if(dr<=v.size()-1) | ~~^~~~~~~~~~~~ main.cpp:48:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<nod>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | if(st<=v.size()-1 && v[a].val>v[st].val) | ~~^~~~~~~~~~~~