Problem	doll_noi
User	Phoubia01
Submission Time	2025-11-06 15:18:38
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

doll_noi.cpp: In function ‘int main()’:
doll_noi.cpp:11:16: error: missing template arguments before ‘.’ token
11 | cout << set.size() << ' ';
| ^