标签：
Given a collection of integers that might contain duplicates, nums, return all possible subsets.
Note: The solution set must not contain duplicate subsets.
For example,
If nums = [1,2,2], a solution
is:
[ [2], [1], [1,2,2], [2,2], [1,2], [] ]
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c++ code:
class Solution {
public:
vector<vector<int>> subsets(vector<int>& nums) {
vector<vector<int>> combs;
vector<int> comb;
combine(combs, comb, nums, 0);
return combs;
}
// 自定义函数
void combine(vector<vector<int>> &combs, vector<int> &comb,vector<int>& nums,int begin) {
combs.push_back(comb);
for(int i=begin;i<nums.size();i++) {
comb.push_back(nums[i]);
combine(combs,comb,nums,i+1);
comb.pop_back();
}
}
};标签：
原文地址：http://blog.csdn.net/itismelzp/article/details/51627541
