Problem	veryeasyproblem
User	penguinzzz
Submission Time	2024-05-08 22:19:37
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

veryeasyproblem.cpp:2:2: error: invalid preprocessing directive #using
2 | #using namespace std;
| ^~~~~
veryeasyproblem.cpp: In function ‘int main()’:
veryeasyproblem.cpp:5:15: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
5 | long long n; cin >> n; cout << n;
| ^~~
| std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:75,
from veryeasyproblem.cpp:1:
/usr/include/c++/9/iostream:60:18: note: ‘std::cin’ declared here
60 | extern istream cin; /// Linked to standard input
| ^~~
veryeasyproblem.cpp:5:25: error: ‘cout’ was not declared in this scope; did you mean ‘std::cout’?
5 | long long n; cin >> n; cout << n;
| ^~~~
| std::cout
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.