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标题：Subsets II通过率：27.5难度：中等Given a collection of integers that might contain duplicates,S, return all possible subsets.Note:Elements in a subset must b... 阅读全文
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标题：Subsets通过率：28.2%难度：中等Given a set of distinct integers,S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The ... 阅读全文
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标题:Palindrome Partitioning通过率：26.3%难度：中等Given a strings, partitionssuch that every substring of the partition is a palindrome.Return all possible pali... 阅读全文
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标题：Combinations通过率：30.5%难度：中等Given two integersnandk, return all possible combinations ofknumbers out of 1 ...n.For example,Ifn= 4 andk= 2, a solution... 阅读全文