Package g0001_0100.s0020_valid_parentheses

Class Solution

java.lang.Object
g0001_0100.s0020_valid_parentheses.Solution
public class Solution extends Object
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:

  1. Open brackets must be closed by the same type of brackets.
  2. 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:

  • 1 <= s.length <= 104
  • s consists of parentheses only '()[]{}'.

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • isValid

      public boolean isValid(String s)