https://school.programmers.co.kr/learn/courses/30/lessons/120830
def solution(n, k):
answer = n * 12000 + k * 2000 - (n//10) * 2000
return answer
https://school.programmers.co.kr/learn/courses/30/lessons/120830
def solution(n, k):
answer = n * 12000 + k * 2000 - (n//10) * 2000
return answer