Problem	sortbooks
User	kenkunkin
Submission Time	2025-11-09 21:59:45
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

sortbooks.cpp: In function ‘void Bai()’:
sortbooks.cpp:71:5: error: ‘build’ was not declared in this scope
71 | build(1,1,n);
| ^~~~~