(Python) 백준 18110 / solved.ac

import sys

input = sys.stdin.readline

def roundd(num):
  """
  자체 반올림 함수
  """
  if ((num % 1) < 0.5):
    return int(num // 1)
  else:
    return int(num // 1 + 1)

asd = int(input())
llst = []

if asd == 0:
  print(0)
else:
  for _ in range(asd):
    llst.append(int(input()))
    

  llst = sorted(llst)

  delNum = roundd((len(llst) * 3) / 20)
  # 삭제할 인원수를 구함

  llst = llst[delNum : len(llst) - delNum]

  ave = sum(llst) / len(llst)

  print(roundd(ave))