(import
  (scheme base)
  (scheme read)
  (scheme write)
)

(define yuki9008
  (let loop
    (
      (n (read))
      (s 0)
    )
    (if (zero? n)
      (begin
        (write s)
        (display "\n")
      )
      (loop (- n 1) (+ s (read)))
    )
  )
)