(let (
      (N (read))
     )
  (let loop((foo (read)) (crane 0) (turtle 0))
    (if (eof-object? foo)
        (begin
          (display crane)
          (display " ")
          (display turtle)
          (newline)
        )
        (if (= foo (* (- N 1) 4))
            (loop (read) (+ crane 1) turtle)
            (loop (read) crane (+ turtle 1))
        )
    )
  )
)