# 575.Distribute Candies

**575.Distribute Candies**

难度:Easy

> 给定一个偶数长度的数组，其中不同的数字代表着不同种类的糖果，每一个数字代表一个糖果。你需要把这些糖果平均分给一个弟弟和一个妹妹。返回妹妹可以获得的最大糖果的种类数。

```
示例 1:

输入: candies = [1,1,2,2,3,3]
输出: 3
解析: 一共有三种种类的糖果，每一种都有两个。
     最优分配方案：妹妹获得[1,2,3],弟弟也获得[1,2,3]。这样使妹妹获得糖果的种类数最多。
示例 2 :

输入: candies = [1,1,2,3]
输出: 2
解析: 妹妹获得糖果[2,3],弟弟获得糖果[1,1]，妹妹有两种不同的糖果，弟弟只有一种。这样使得妹妹可以获得的糖果种类数最多。
```

注意:

数组的长度为\[2, 10,000]，并且确定为偶数。 数组中数字的大小在范围\[-100,000, 100,000]内。

代码如下：

```
class Solution {
public:
    int distributeCandies(vector<int>& candies) {
        unordered_set<int> cans(candies.begin(),candies.end());
        return min(cans.size(),candies.size()/2);
    }
};
```


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