import strutils, sequtils
proc main() =
  let N = stdin.readLine.parseInt
  let A = stdin.readLine.split.map(parseInt)

  var z = 0
  for x in 0..100:
    var s = A.foldl(a+b) + x
    if (s div N).toFloat == s / N:
      z += 1

  echo z

when isMainModule: main()