(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 #\# #\> (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 (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) ;; BEGIN_INSERTED_CONTENTS (declaim (inline tzcount)) (defun tzcount (x) "Is equivalent to TZCNT operation: it returns the number of trailing zero bits. Note that (TZCOUNT 0) = -1." (- (integer-length (logand x (- x))) 1)) ;; The following code also works though it is slower on AtCoder as LOGCOUNT is ;; not transformed to POPCNT on SBCL 1.1.14. ;; (declaim (inline tzcount2)) ;; (defun tzcount2 (x) ;; (logcount (- (logand x (- x)) 1))) (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)) (declaim (ftype (function * (values uint62 &optional)) read-fixnum+)) (defun read-fixnum+ (&optional (in *standard-input*)) "NOTE: cannot read -2^62" (declare #.OPT #-swank (sb-kernel:ansi-stream in)) (macrolet ((%read-byte () `(the (unsigned-byte 8) #+swank (char-code (read-char in nil #\Nul)) #-swank (sb-impl::ansi-stream-read-byte in nil #.(char-code #\Nul) nil)))) (let* ((result (loop (let ((byte (%read-byte))) (when(<= 48 byte) (return (- byte 48))))))) (declare ((integer 0 #.most-positive-fixnum) result)) (loop (let* ((byte (%read-byte))) (if (<= 48 byte) (setq result (+ (- byte 48) (* 10 (the (integer 0 #.(floor most-positive-fixnum 10)) result)))) (return result))))))) (deftype uint62+ () '(integer 1 #.most-positive-fixnum)) (declaim (inline fast-gcd) (ftype (function * (values (integer 0 #.most-positive-fixnum) &optional)) fast-gcd)) (defun fast-gcd (u v) (declare (optimize (speed 3) (safety 0)) ((integer 0 #.most-positive-fixnum) u v)) (let ((shift (tzcount (logior u v)))) (setq u (ash u (- 1 (integer-length (logand u (- u)))))) (loop (setq v (ash v (- 1 (integer-length (logand v (- v)))))) (when (> u v) (rotatef u v)) (setq v (- v u)) ;; (decf v u) (when (zerop v) (return (the (integer 1 #.most-positive-fixnum) (ash u shift))))))) (defun make-disjoint-sparse-table (vector) "BINOP := binary operator (comprising a semigroup)" (declare #.OPT ((simple-array uint62 (*)) vector)) (let* ((n (length vector)) (height (max 1 (integer-length (- n 1)))) (table (make-array (list height n) :element-type 'uint62))) (dotimes (j n) (setf (aref table 0 j) (aref vector j))) (do ((i 1 (+ i 1))) ((>= i height)) (let* ((width/2 (ash 1 i)) (width (* width/2 2))) (do ((j 0 (+ j width))) ((>= j n)) (let ((mid (min (+ j width/2) n))) ;; fill the first half (setf (aref table i (- mid 1)) (aref vector (- mid 1))) (do ((k (- mid 2) (- k 1))) ((< k j)) (setf (aref table i k) (fast-gcd (aref vector k) (aref table i (+ k 1))))) (when (>= mid n) (return)) ;; fill the second half (setf (aref table i mid) (aref vector mid)) (let ((end (min n (+ mid width/2)))) (do ((k (+ mid 1) (+ k 1))) ((>= k end)) (setf (aref table i k) (fast-gcd (aref table i (- k 1)) (aref vector k))))))))) table)) (declaim (inline dst-query)) (defun dst-query (table left right &optional identity) "Queries the interval [LEFT, RIGHT). Returns IDENTITY for a null interval [x, x)." (declare ((integer 0 #.most-positive-fixnum) left right) ((simple-array uint62 (* *)) table)) (when (>= left right) (assert (= left right)) (return-from dst-query identity)) (setq right (- right 1)) ;; change to closed interval (if (= left right) (aref table 0 left) (let ((h (- (integer-length (logxor left right)) 1))) (fast-gcd (the uint62+ (aref table h left)) (the uint62+ (aref table h right)))))) (in-package :cl-user) (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))) (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 () (declare #.OPT) (let* ((n (read)) (as (make-array n :element-type 'uint62 :initial-element 0))) (declare (uint31 n)) (dotimes (i n) (setf (aref as i) (read-fixnum+))) (let ((r 0) (dtable (make-disjoint-sparse-table as)) (res 0)) (declare (uint62 r res)) (dotimes (l n) (maxf r l) (let ((value (dst-query dtable l (max (+ l 1) r) 0))) (declare (uint62 value)) (loop (when (= r n) (return)) (let* ((a (aref as r)) (new-value (fast-gcd value a))) (when (= 1 new-value) (return)) (setq value new-value) (incf r))) (incf res (- r l)))) (println (- (ash (* n (+ n 1)) -1) 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 "500000~%") (dotimes (_ 500000) (println (+ 1 (random #.(expt 10 18))) 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 "3 1 2 3 " "4 ")) (it.bese.fiveam:is (common-lisp-user::io-equal "4 1 1 1 1 " "10 ")) (it.bese.fiveam:is (common-lisp-user::io-equal "4 2 4 8 16 " "0 ")) (it.bese.fiveam:is (common-lisp-user::io-equal "10 801754 703742 332182 68016 914814 8470 937255 293192 313080 501971 " "28 ")))