Problem	bookshelf
User	Caoxizhen
Submission Time	2025-12-16 16:29:24
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

bookshelf.cpp:5:7: error: expected initializer before ‘op’
5 | int n op;
| ^~
bookshelf.cpp: In function ‘int main()’:
bookshelf.cpp:10:12: error: ‘n’ was not declared in this scope
10 | cin >> n;
| ^
bookshelf.cpp:16:16: error: ‘op’ was not declared in this scope
16 | cin >> op;
| ^~