Balanced Brackets Checker

2023/Oct/Nov·Variant 2

HARDStacks

A string contains only the characters ( and ). Use an array-based stack to check whether the brackets are balanced — every ( must have a matching ), closing brackets may never appear before their opener, and no bracket may be left unmatched at the end.

Input: One string of brackets. Output: TRUE if balanced, FALSE otherwise.

Example:

Input:  (())
Output: TRUE

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Sample Test Cases

Test 1: Nested brackets balance

Inputs: (())

Expected: TRUE

Test 2: Missing closing bracket

Inputs: (()

Expected: FALSE

Test 3: Closing bracket before any opener

Inputs: )(

Expected: FALSE