Owl Get a Life

Compile Error

In file included from grader.cpp:2:
littlejohnny0.h:1:1: error: ‘vector’ does not name a type
1 | vector<int> solve(int N);
| ^~~~~~
littlejohnny0.h:2:11: error: ‘vector’ was not declared in this scope
2 | int query(vector<int> J);
| ^~~~~~
littlejohnny0.h:2:11: note: suggested alternatives:
In file included from /usr/include/c++/9/vector:67,
from /usr/include/c++/9/functional:62,
from /usr/include/c++/9/pstl/glue_algorithm_defs.h:13,
from /usr/include/c++/9/algorithm:71,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:65,
from grader.cpp:1:
/usr/include/c++/9/bits/stl_vector.h:386:11: note: ‘std::vector’
386 | class vector : protected _Vector_base<_Tp, _Alloc>
| ^~~~~~
In file included from /usr/include/c++/9/functional:62,
from /usr/include/c++/9/pstl/g