Owl Get a Life

Compile Error

sumint.cpp:2:1: error: ‘define’ does not name a type
2 | define int long long
| ^~~~~~
sumint.cpp: In function ‘int main()’:
sumint.cpp:7:2: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
7 | cin >> n;
| ^~~
| std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:75,
from sumint.cpp:1:
/usr/include/c++/9/iostream:60:18: note: ‘std::cin’ declared here
60 | extern istream cin; /// Linked to standard input
| ^~~
sumint.cpp:8:2: error: ‘vector’ was not declared in this scope
8 | vector<int> A(n);
| ^~~~~~
sumint.cpp:8:2: 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,