폰켓몬

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

프로그래머스

def solution(nums):
    answer = len(nums) / 2
    poketmon = set()
    
    for num in nums:
        poketmon.add(num)
    if answer > len(poketmon):
        answer = len(poketmon)
    return answer