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37 lines
597 B
37 lines
597 B
20. Valid Parentheses
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Easy
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Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
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An input string is valid if:
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Open brackets must be closed by the same type of brackets.
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Open brackets must be closed in the correct order.
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Every close bracket has a corresponding open bracket of the same type.
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Example 1:
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Input: s = "()"
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Output: true
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Example 2:
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Input: s = "()[]{}"
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Output: true
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Example 3:
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Input: s = "(]"
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Output: false
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Constraints:
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1 <= s.length <= 104
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s consists of parentheses only '()[]{}'.
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