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Blind 75 Difficulty: Easy Difficulty: Medium Difficulty: Hard

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Valid Parentheses

easy Solve on LeetCode

Last edited: February 7, 2026

Problem
Examples
Example 1
Example 2
Example 3
More Examples
Follow up
Solution
Method 1 - Using stack and close to open map
Intuition
Approach
Video explanation
Complexity
Code
Method 2 - Using Stack and open to close map
Why Stack?
Code
Complexity
Dry Run
Follow up - When there is only one type of parentheses
Method 1 - Using Counter
Intuition
Approach
Pseudocode
Complexity
Code

video explanation

Related Tags

daily-coding-problem duplicates-algo leetcode parentheses string video

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