(eval-when (:compile-toplevel :load-toplevel :execute)
  (sb-int:defconstant-eqx OPT
    #+swank '(optimize (speed 3) (safety 2))
    #-swank '(optimize (speed 3) (safety 0) (debug 0))
    #'equal)
  #+swank (ql:quickload '(:cl-debug-print :fiveam) :silent t)
  #-swank (set-dispatch-macro-character
           ;; enclose the form with VALUES to avoid being captured by LOOP macro
           #\# #\> (lambda (s c p) (declare (ignore c p)) `(values ,(read s nil nil t)))))
#+swank (cl-syntax:use-syntax cl-debug-print:debug-print-syntax)
#-swank (disable-debugger) ; for CS Academy

;; BEGIN_INSERTED_CONTENTS
(macrolet ((def (name fname)
             `(define-modify-macro ,name (new-value) ,fname)))
  (def minf min)
  (def maxf max)
  (def mulf *)
  (def divf /)
  (def iorf logior)
  (def xorf logxor)
  (def andf logand))

(defmacro dbg (&rest forms)
  #+swank
  (if (= (length forms) 1)
      `(format *error-output* "~A => ~A~%" ',(car forms) ,(car forms))
      `(format *error-output* "~A => ~A~%" ',forms `(,,@forms)))
  #-swank (declare (ignore forms)))

(defmacro define-int-types (&rest bits)
  `(progn
     ,@(mapcar (lambda (b) `(deftype ,(intern (format nil "UINT~A" b)) () '(unsigned-byte ,b))) bits)
     ,@(mapcar (lambda (b) `(deftype ,(intern (format nil "INT~A" b)) () '(signed-byte ,b))) bits)))
(define-int-types 2 4 7 8 15 16 31 32 62 63 64)

(declaim (inline println))
(defun println (obj &optional (stream *standard-output*))
  (let ((*read-default-float-format* 'double-float))
    (prog1 (princ obj stream) (terpri stream))))

(defconstant +mod+ 1000000007)

;;;
;;; Body
;;;

(defun main ()
  (let* ((input (read-line))
         (len (length input))
         (s (make-array (+ len 1) :element-type 'uint8))
         ;; 0: 繰り上げないで払う 1: 繰り上げて払う
         (dp (make-array (list (+ len 2) 2) :element-type 'uint62
                                            :initial-element most-positive-fixnum)))
    (declare (simple-string input))
    (loop for i below len
          for c across input
          for d = (- (char-code c) 48)
          do (setf (aref s (- len i 1)) d))
    (setf (aref dp 0 0) 0)
    (dotimes (x (+ len 1))
      (let ((d (aref s x)))
        ;; 繰り上げていない状態 -> 繰り上げていない状態
        (minf (aref dp (+ x 1) 0)
              (+ (aref dp x 0) d))
        ;; 繰り上げていない状態 -> 繰り上げた状態
        (minf (aref dp (+ x 1) 1)
              (+ (aref dp x 0) (- 10 d)))
        ;; 繰り上げた状態 -> 繰り上げていない状態
        (minf (aref dp (+ x 1) 0)
              (+ (aref dp x 1) d 1))
        ;; 繰り上げた状態 -> 繰り上げた状態
        (minf (aref dp (+ x 1) 1)
              (+ (aref dp x 1) (- 10 (+ d 1))))))
    (println (min (aref dp (+ len 1) 0)
                  (aref dp (+ len 1) 1)))
    ;; #>s
    ;; (let ((carry nil)
    ;;       (res 0))
    ;;   (dotimes (i (length s))
    ;;     (let ((d (aref s i)))
    ;;       #>d
    ;;       (when carry
    ;;         (incf d)
    ;;         (setq carry nil))
    ;;       (ecase d
    ;;         (0)
    ;;         (1 (incf res 1))
    ;;         (2 (incf res 2))
    ;;         (3 (incf res 3))
    ;;         (4 (incf res 4))
    ;;         (5 (incf res 5))
    ;;         (6 (incf res 4) (setq carry t))
    ;;         (7 (incf res 3) (setq carry t))
    ;;         (8 (incf res 2) (setq carry t))
    ;;         (9 (incf res 1) (setq carry t))
    ;;         (10 (setq carry t))))
    ;;     #>res)
    ;;   (println res))
    ))

#-swank (main)

;;;
;;; Test and benchmark
;;;

#+swank
(defun io-equal (in-string out-string &key (function #'main) (test #'equal))
  "Passes IN-STRING to *STANDARD-INPUT*, executes FUNCTION, and returns true if
the string output to *STANDARD-OUTPUT* is equal to OUT-STRING."
  (labels ((ensure-last-lf (s)
             (if (eql (uiop:last-char s) #\Linefeed)
                 s
                 (uiop:strcat s uiop:+lf+))))
    (funcall test
             (ensure-last-lf out-string)
             (with-output-to-string (out)
               (let ((*standard-output* out))
                 (with-input-from-string (*standard-input* (ensure-last-lf in-string))
                   (funcall function)))))))

#+swank
(defun get-clipbrd ()
  (with-output-to-string (out)
    (run-program "powershell.exe" '("-Command" "Get-Clipboard") :output out :search t)))

#+swank (defparameter *this-pathname* (uiop:current-lisp-file-pathname))
#+swank (defparameter *dat-pathname* (uiop:merge-pathnames* "test.dat" *this-pathname*))

#+swank
(defun run (&optional thing (out *standard-output*))
  "THING := null | string | symbol | pathname

null: run #'MAIN using the text on clipboard as input.
string: run #'MAIN using the string as input.
symbol: alias of FIVEAM:RUN!.
pathname: run #'MAIN using the text file as input."
  (let ((*standard-output* out))
    (etypecase thing
      (null
       (with-input-from-string (*standard-input* (delete #\Return (get-clipbrd)))
         (main)))
      (string
       (with-input-from-string (*standard-input* (delete #\Return thing))
         (main)))
      (symbol (5am:run! thing))
      (pathname
       (with-open-file (*standard-input* thing)
         (main))))))

#+swank
(defun gen-dat ()
  (uiop:with-output-file (out *dat-pathname* :if-exists :supersede)
    (format out "")))

#+swank
(defun bench (&optional (out (make-broadcast-stream)))
  (time (run *dat-pathname* out)))

;; To run: (5am:run! :sample)
#+swank
(it.bese.fiveam:test :sample
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "36
"
    "8
"))
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "91
"
    "3
"))
  (it.bese.fiveam:is
   (common-lisp-user::io-equal "314159265358979323846264338327950288419716939937551058209749445923078164062862089986280348253421170
"
    "243
")))


Measured memory_bytes: 45544