Package g0001_0100.s0020_valid_parentheses

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    20 - Valid Parentheses\.

    Easy

    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.

    Example 1:

    Input: s = "()"

    Output: true

    Example 2:

    Input: s = "()[]{}"

    Output: true

    Example 3:

    Input: s = "(]"

    Output: false

    Example 4:

    Input: s = "()"

    Output: false

    Example 5:

    Input: s = "{[]}"

    Output: true

    Constraints:

    • <code>1 <= s.length <= 10<sup>4</sup></code>

    • s consists of parentheses only '()[]{}'.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Boolean isValid(String s)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait