【LeetCode】47. Permutations II
Permutations II Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example,[1,1,2] have ...
原文：[LeetCode] 47. Permutations II 全排列之二
Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: 这道题是之前那道Permutations的延伸，由于输入数组有可能出现重复数字，如果按照之前的算法运算，会有重复排列产生，我们要避免重复的产生，在递归函数中要判断前面一个数和当 ...
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