Valid Parentheses
easyGiven 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: The single pair of parentheses is properly matched.
Example 2
Input: s = "()[]{}"
Output: true
Explanation: All three pairs are properly matched.
Example 3
Input: s = "(]"
Output: false
Explanation: The opening parenthesis is not matched by the same type of closing bracket.
Constraints
1 <= s.length <= 10^4s consists of parentheses only '()[]{}'.
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Test Cases
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