[프로그래머스] 폰켓몬

import java.util.*;
class Solution {
    public int solution(int[] nums) {
        int answer = 0;
        int max = nums.length/2;
        HashSet<Integer> set = new HashSet<>();
        
        for(int x: nums){
            set.add(x);
        }
        
        if(set.size()> max){
            answer = max;
        }else{
            answer = set.size();
        }

        return answer;
    }
}