Problem	uniquenumbers
User	Minjia
Submission Time	2023-11-08 15:26:08
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

uniquenumbers.cpp: In function ‘int main()’:
uniquenumbers.cpp:11:3: error: ‘insert’ was not declared in this scope
11 | insert(x);
| ^~~~~~
uniquenumbers.cpp:13:7: error: no match for ‘operator<<’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘<unresolved overloaded function type>’)
13 | cout << size;
| ~~~~~^~~~~~~
In file included from /usr/include/c++/9/iostream:39,
from uniquenumbers.cpp:2:
/usr/include/c++/9/ostream:108:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]’
108 | operator<<(_