Valid Parentheses

For this question we ask you to determine whether or not a string has valid parentheses. A string has valid parentheses if each bracket is closed and opened in the same order and has the same type. Parentheses has 3 types (), {} and []

Input

  • s: String containing the parentheses

Output

Whether or not the string is valid

Examples

Example 1:

Input:

s = ()

Output: true

Explanation:

This is a valid parentheses sequence.

Example 2:

Input:

s = (}

Output: false

Explanation:

This is not valid as } cannot match (.

Constraints

  • 1 <= s.length <= 100000

Try it yourself

Solution

Title

Script

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.

Contrary to popular belief, Lorem Ipsum is not simply random text.

  >>> a = [1, 2, 3]
  >>> a[-1]
  3

Get premium for instant access to all content and solutions

Upgrade