프로그래머스 - 폰켓몬

import java.util.Arrays;

class Solution {
    public int solution(int[] nums) {
        int answer = 0;
        Arrays.sort(nums);
        for (int i = 0; i <nums.length-1 ; i++) {
            if(nums[i]==nums[i+1] )nums[i]=0;
        }
        for (int i = 0; i <nums.length ; i++) {
            if(nums[i]!=0) answer++;
        }
        if(answer>nums.length/2) answer=nums.length/2;
        return answer;
    }
}