ポンクモン

import java.util.*;

class Solution {
    public int solution(int[] nums) {
        int answer = 0;
		
        //중복제거
        ArrayList<Integer> list = new ArrayList<>();
        for (int i : nums){
            if(!list.contains(i)) list.add(i);
        }

        if(list.size() >= nums.length/2) answer = nums.length/2;
        else answer = list.size();

        return answer;
    }
}