Problem	cupstacking
User	WangZ
Submission Time	2026-05-29 22:29:14
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

cupstacking.cpp: In function ‘int main()’:
cupstacking.cpp:34:13: error: ‘sum’ was not declared in this scope
34 | cout << sum;
| ^~~