Eroare de compilare: main.cpp: In function 'int main()': main.cpp:15:11: error: 'gets' was not declared in this scope; did you mean 'fgets'? 15 | while(gets(op)) { | ^~~~ | fgets main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | if(aux == bst.size()) fout << "-1\n"; | ~~~~^~~~~~~~~~~~~ Non zero exit status: 1