[프로그래머스] 폰켓몬 - JAVA

문제
https://school.programmers.co.kr/learn/courses/30/lessons/1845

프로그래머스

 

코드

import java.util.*;

class Solution {
    public int solution(int[] nums) {
        HashMap<Integer, Integer> hashMap = new HashMap<>();

        for(int i=0;i<nums.length;i++){
            if(hashMap.containsKey(nums[i])){
                hashMap.put(nums[i], hashMap.get(nums[i])+1);
            }
            else{
                hashMap.put(nums[i], 1);
            }
        }



        int answer = nums.length / 2 > hashMap.size() ? hashMap.size() : nums.length/2;


        return answer;

    }
}