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.
\n\n\n
Example 1:
\n\n\nInput: s = "()())()"\nOutput: ["(())()","()()()"]\n\n\n
Example 2:
\n\n\nInput: s = "(a)())()"\nOutput: ["(a())()","(a)()()"]\n\n\n
Example 3:
\n\n\nInput: s = ")("\nOutput: [""]\n\n\n\n
Constraints:
\n\n1 <= s.length <= 25s consists of lowercase English letters and parentheses '(' and ')'.20 parentheses in s.给你一个由若干括号和字母组成的字符串 s ，删除最小数量的无效括号，使得输入的字符串有效。
返回所有可能的结果。答案可以按 任意顺序 返回。
\n\n\n\n
示例 1：
\n\n\n输入：s = \"()())()\"\n输出：[\"(())()\",\"()()()\"]\n\n\n
示例 2：
\n\n\n输入：s = \"(a)())()\"\n输出：[\"(a())()\",\"(a)()()\"]\n\n\n
示例 3：
\n\n\n输入：s = \")(\"\n输出：[\"\"]\n\n\n
\n\n
提示：
\n\n1 <= s.length <= 25s 由小写英文字母以及括号 '(' 和 ')' 组成s 中至多含 20 个括号\\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\"],\"java\":[\"Java\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u88ab\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5305\\u542b Pair \\u7c7b: https:\\/\\/docs.oracle.com\\/javase\\/8\\/javafx\\/api\\/javafx\\/util\\/Pair.html <\\/p>\"],\"python\":[\"Python\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982\\uff1aarray<\\/a>, bisect<\\/a>, 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"editorType": "CKEDITOR",
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"style": "LEETCODE",
"exampleTestcases": "\"()())()\"\n\"(a)())()\"\n\")(\"",
"__typename": "QuestionNode"
}
}
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