301. Remove Invalid Parentheses
Description
Given a string s
that contains parentheses and letters, remove the minimum number of invalid parentheses to make the input string valid.
Return a list of unique strings that are valid with the minimum number of removals. You may return the answer in any order.
Example 1:
Input: s = "()())()" Output: ["(())()","()()()"]
Example 2:
Input: s = "(a)())()" Output: ["(a())()","(a)()()"]
Example 3:
Input: s = ")(" Output: [""]
Constraints:
1 <= s.length <= 25
s
consists of lowercase English letters and parentheses'('
and')'
.- There will be at most
20
parentheses ins
.
Solutions
Solution 1
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