(in-package :cl-user) (eval-when (:compile-toplevel :load-toplevel :execute) (defparameter *opt* #+swank '(optimize (speed 3) (safety 2)) #-swank '(optimize (speed 3) (safety 0) (debug 0))) #+swank (ql:quickload '(:cl-debug-print :fiveam :cp/util) :silent t) #+swank (use-package :cp/util :cl-user) #-swank (set-dispatch-macro-character #\# #\> (lambda (s c p) (declare (ignore c p)) `(values ,(read s nil nil t))))) #+swank (set-dispatch-macro-character #\# #\> #'cl-debug-print:debug-print-reader) (macrolet ((def (b) `(progn (deftype ,(intern (format nil "UINT~A" b)) () '(unsigned-byte ,b)) (deftype ,(intern (format nil "INT~A" b)) () '(signed-byte ,b)))) (define-int-types (&rest bits) `(progn ,@(mapcar (lambda (b) `(def ,b)) bits)))) (define-int-types 2 4 7 8 15 16 31 32 62 63 64)) (defconstant +mod+ 1000000007) (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* (if (typep obj 'double-float) 'double-float *read-default-float-format*))) (prog1 (princ obj stream) (terpri stream)))) ;; BEGIN_INSERTED_CONTENTS (defpackage :cp/read-fixnum (:use :cl) (:export #:read-fixnum)) (in-package :cp/read-fixnum) (declaim (ftype (function * (values fixnum &optional)) read-fixnum)) (defun read-fixnum (&optional (in *standard-input*)) "NOTE: cannot read -2^62" (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* ((minus nil) (result (loop (let ((byte (%read-byte))) (cond ((<= 48 byte 57) (return (- byte 48))) ((zerop byte) ; #\Nul (error "Read EOF or #\Nul.")) ((= byte #.(char-code #\-)) (setq minus t))))))) (declare ((integer 0 #.most-positive-fixnum) result)) (loop (let* ((byte (%read-byte))) (if (<= 48 byte 57) (setq result (+ (- byte 48) (* 10 (the (integer 0 #.(floor most-positive-fixnum 10)) result)))) (return (if minus (- result) result)))))))) (defpackage :cp/modify-macro (:use :cl) (:export #:minf #:maxf #:mulf #:divf #:iorf #:xorf #:andf)) (in-package :cp/modify-macro) (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)) ;; BEGIN_USE_PACKAGE (eval-when (:compile-toplevel :load-toplevel :execute) (use-package :cp/modify-macro :cl-user)) (eval-when (:compile-toplevel :load-toplevel :execute) (use-package :cp/read-fixnum :cl-user)) (in-package :cl-user) ;;; ;;; Body ;;; (defun main () (let* ((n (read)) (xs (sort (loop repeat n collect (read-fixnum)) #'>)) (res most-positive-fixnum)) (loop for (x1 x2) on xs while x2 for d = (- x1 x2) when (> d 0) do (minf res d)) (println (if (= res most-positive-fixnum) 0 res)))) #-swank (main) ;;; ;;; Test and benchmark ;;; #+swank (progn (defparameter *lisp-file-pathname* (uiop:current-lisp-file-pathname)) (setq *default-pathname-defaults* (uiop:pathname-directory-pathname *lisp-file-pathname*)) (uiop:chdir *default-pathname-defaults*) (defparameter *dat-pathname* (uiop:merge-pathnames* "test.dat" *lisp-file-pathname*)) (defparameter *problem-url* "https://yukicoder.me/problems/no/135")) #+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))) #+(and sbcl (not swank)) (eval-when (:compile-toplevel) (when (or (> sb-c::*compiler-warning-count* 0) sb-c::*undefined-warnings*) (error "count: ~D, undefined warnings: ~A" sb-c::*compiler-warning-count* sb-c::*undefined-warnings*))) ;; To run: (5am:run! :sample) #+swank (5am:test :sample (5am:is (equal "49 " (run "3 0 51 100 " nil))) (5am:is (equal "1 " (run "4 0 1 1 0 " nil))))