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폰켓몬 #397

@fkdl0048

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@fkdl0048
#include <vector>
#include <unordered_set>

using namespace std;

int solution(vector<int> nums) {
    unordered_set<int> s(nums.begin(), nums.end());
    
    return nums.size() / 2 < s.size() ? nums.size() / 2 : s.size();
}

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