Skip to content
6
0
:
0
0

Valid Parentheses

Easy

Stack

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.
  3. Every close bracket has a corresponding open bracket of the same type.

Example 1

Input:s = "()"
Output:true

The opening parenthesis is closed by the same type in the correct order.

Example 2

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

All three bracket pairs are valid and properly ordered.

Example 3

Input:s = "(]"
Output:false

The opening '(' is closed by ']', so the bracket types do not match.

Constraints

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

Test Cases (2)

Test Case 1
Input:
"()"
Expected Output:
true
Test Case 2
Input:
"()[]{}"
Expected Output:
true