[프로그래머스] 폰켓몬

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

class Solution {
    public int solution(int[] nums) {
         int answer = 0;

        List<Integer> numbers = new ArrayList<>();
        for(int i =0 ;i < nums.length; i++){
            numbers.add(nums[i]);
        }

        List<Integer> finalNumbers = numbers.stream().distinct().collect(Collectors.toList());

        Integer size = finalNumbers.size();
        Integer comparedSize = nums.length / 2;
        answer = (comparedSize < size) ? comparedSize : size;

        return answer;
    }
}