import strutils, sequtils, algorithm, math

discard readLine(stdin).parseInt

let
  cSeq = readLine(stdin).split(' ').map(parseInt)
  border = cSeq.sum div 10
  result = 30 * cSeq.map(proc (c: int): int =
    if c <= border: 1
    else: 0
  ).sum

echo(result)