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Valid Parentheses
Difficulty: Easy
Category: DSA
Topics: String, Stack
Asked at: Amazon, Bloomberg, Facebook, Apple, Microsoft, Expedia, Spotify, Google, LinkedIn, Goldman Sachs, Oracle, IBM, JPMorgan, Intuit, Paypal, Atlassian, eBay, Adobe, ServiceNow, Qualcomm
Given a string `s` containing just the characters `'('`, `')'`, `'{'`, `'}'`, `'['` and `']'`, determine if the input string is valid.
An input string is valid if:
- Open brackets must be closed by the same type of brackets.
- Open brackets must be closed in the correct order.
- Every close bracket has a corresponding open bracket of the same type.
**Example 1:**
**Input:** s = "()"
**Output:** true
**Example 2:**
**Input:** s = "()[]{}"
**Output:** true
**Example 3:**
**Input:** s = "(]"
**Output:** false
**Example 4:**
**Input:** s = "([])"
**Output:** true
**Constraints:**
- `1 <= s.length <= 104`
- `s` consists of parentheses only `'()[]{}'`.
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