Problem	rollercoaster
User	BuiNgocDuc
Submission Time	2025-06-20 16:33:08
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

rollercoaster.cpp: In function ‘int main()’:
rollercoaster.cpp:7:5: error: ‘arr’ was not declared in this scope
7 | arr[n];
| ^~~