3. Valid Parentheses
StackStrings
Given a string `s` containing just the characters `'('`, `')'`, `'{'`, `'}'`, `'['` and `']'`, determine if the input string is valid.
An input string is valid if:
1. Open brackets must be closed by the same type of brackets.
2. Open brackets must be closed in the correct order.
3. Every close bracket has a corresponding open bracket of the same type.
Example 1:
Input: s = "()"
Output: true
Explanation: Matching pair of parentheses.
Example 2:
Input: s = "()[]{}"
Output: true
Explanation: All bracket pairs match correctly.
Example 3:
Input: s = "(]"
Output: false
Explanation: Mismatched closing bracket.
Constraints:
- 1 <= s.length <= 10^4
- s consists of parentheses only ()[]{}.
Integrity: 100%
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Input Arguments:
s = "()[]{}"Expected Output:
true