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Valid Parentheses

Medium

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Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.

Sample Input:

"()[]{}"

Sample Output:

true

Hints

Hint 1

Use a stack to keep track of opening brackets

Hint 2

When encountering a closing bracket, check if it matches the top of the stack

Hint 3

The string is valid if the stack is empty at the end

Code Editor

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