Problem	area_noi
User	lxmine
Submission Time	2026-05-26 22:14:14
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

area_noi.cpp: In function ‘int main()’:
area_noi.cpp:4:9: error: ‘cin’ was not declared in this scope; did you mean ‘std::cin’?
4 | int n; cin >> n;
| ^~~
| std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:75,
from area_noi.cpp:1:
/usr/include/c++/9/iostream:60:18: note: ‘std::cin’ declared here
60 | extern istream cin; /// Linked to standard input
| ^~~