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Remove Invalid Parentheses

Medium

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Remove minimum number of invalid parentheses to make the input string valid.

Sample Input:

"()())()"

Sample Output:

["()()()", "(())()"]

Hints

Hint 1

Use BFS to explore all possibilities

Hint 2

Check if string is valid before adding to queue

Hint 3

Stop when first valid strings are found

Code Editor

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