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

it could be 1 line...

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

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