[leetcode]Subsets II
和上一個差不多,但是有重復. 有重復元素就挺麻煩的. 比如 1 1 1 我每個1都是可以選或者不選 那么第一個和第三個選了,第二個不選和第一個第二個選了第三個不選是一樣的效果... 可以按 ...
原文：LeetCode:Subsets I II
求集合的所有子集問題 LeetCode:Subsets Given a set of distinct integers,S, return all possible subsets. Note: Elements in a subset must be in non descending order. The solution set must not contain duplicate sub ...
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