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Longest Valid Parentheses

Hard

00:00

0 users online

Given a string containing just parentheses, find the length of the longest valid parentheses substring.

Sample Input:

"(()"

Sample Output:

Hints

Hint 1

Use stack to track indices of parentheses

Hint 2

Push -1 as initial marker

Hint 3

Calculate length when finding matching pair

Code Editor

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