Eroare de compilare: main.cpp: In function 'int main()': main.cpp:16:19: error: too few arguments to function 'char* fgets(char*, int, FILE*)' 16 | while(fgets(op)) { | ^ In file included from /usr/include/c++/10/cstdio:42, from /usr/include/c++/10/ext/string_conversions.h:43, from /usr/include/c++/10/bits/basic_string.h:6545, from /usr/include/c++/10/string:55, from /usr/include/c++/10/bits/locale_classes.h:40, from /usr/include/c++/10/bits/ios_base.h:41, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/fstream:38, from main.cpp:1: /usr/include/stdio.h:564:14: note: declared here 564 | extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) | ^~~~~ main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(aux == bst.size()) fout << "-1\n"; | ~~~~^~~~~~~~~~~~~ Non zero exit status: 1