Problem	bracketex
User	xyzidk9
Submission Time	2026-04-18 10:11:21
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

bracketex.cpp:1:1: error: ‘def’ does not name a type
1 | def is_valid(s):
| ^~~
bracketex.cpp:9:5: error: expected unqualified-id before ‘for’
9 | for ch in s:
| ^~~