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;
}
}