結果
| 問題 |
No.5007 Steiner Space Travel
|
| コンテスト | |
| ユーザー |
 motoshira
|
| 提出日時 | 2023-04-23 22:43:09 |
| 言語 | Common Lisp (sbcl 2.5.0) |
| 結果 |
AC
|
| 実行時間 | 90 ms / 1,000 ms |
| コード長 | 14,077 bytes |
| コンパイル時間 | 722 ms |
| コンパイル使用メモリ | 52,476 KB |
| 実行使用メモリ | 40,948 KB |
| スコア | 6,271,482 |
| 最終ジャッジ日時 | 2023-04-23 22:43:16 |
| 合計ジャッジ時間 | 5,326 ms |
|
ジャッジサーバーID （参考情報） |
judge15 / judge11 |
| 純コード判定しない問題か言語 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| other | AC * 30 |
コンパイルメッセージ
; compiling file "/home/judge/data/code/Main.lisp" (written 23 APR 2023 10:43:10 PM): ; processing (IN-PACKAGE #:CL-USER) ; processing (DECLAIM (OPTIMIZE # ...)) ; processing (DECLAIM (MUFFLE-CONDITIONS COMPILER-NOTE)) ; processing (DISABLE-DEBUGGER) ; processing (SET-DISPATCH-MACRO-CHARACTER #\# ...) ; processing (SET-DISPATCH-MACRO-CHARACTER #\# ...) ; processing (DEFPACKAGE RANDOMIZED-HEAP ...) ; processing (IN-PACKAGE #:RANDOMIZED-HEAP) ; processing (DEFVAR *OPT* ...) ; processing (DECLAIM (INLINE %MAKE-NODE ...)) ; processing (DEFSTRUCT (NODE # ...) ...) ; processing (DEFSTRUCT (RANDOMIZED-HEAP #) ...) ; processing (DEFUN COUNT ...) ; processing (DECLAIM (INLINE %DIRECTION)) ; processing (DEFUN %DIRECTION ...) ; processing (DEFUN MELD ...) ; processing (DECLAIM (INLINE PEAK)) ; processing (DEFUN PEAK ...) ; processing (DEFUN EMPTY-P ...) ; processing (DECLAIM (INLINE POP! ...)) ; processing (DEFUN POP! ...) ; processing (DEFUN PUSH! ...) ; processing (DEFMACRO DO-ALL-KVS ...) ; processing (DEFUN PRUNE! ...) ; processing (IN-PACKAGE #:CL-USER) ; processing (DEFMACRO AWHEN ...) ; processing (DEFMACRO WHILE ...) ; processing (DEFMACRO EVAL-ALWAYS ...) ; processing (IN-PACKAGE #:CL-USER) ; processing (DEFMACRO %EXPANDER-BODY ...) ; processing (DEFMACRO DEFINE-ECASE-EXPANDER ...) ; processing (EVAL-ALWAYS (DEFCONSTANT +PLANET-AMOUNT+ ...) ...) ; processing (DEFTYPE COORD ...) ; processing (DECLAIM (INLINE Y ...)) ; processing (DEFUN MAKE-COORD ...) ; processing (DEFUN Y ...) ; processing (DEFUN X ...) ; processing (DEFTYPE PLANETS ...) ; processing (DEFUN READ-INPUT ...) ; processing (DEFTYPE STATIONS ...) ; processing (DEFTYPE ORDERS ...) ; processing (DEFUN MAKE-STATION-COORDS ...) ; processing (DEFCONSTANT +INF+ ...) ; processing (DEFTYPE %COSTS ...) ; processing (DEFUN %PLANET-ID-P ...) ; processing (DEFUN %SQUARED-EUCLID-DISTANCE ...) ; processing (DEFUN %GET-NEAREST-COSTS-AND-PATHS-FROM ...) ; processing (DEFUN %GET-EACH-NODE-COSTS-AND-PATHS ...) ; processing
ソースコード
(in-package #:cl-user)
;;;
;;; Init
;;;
(eval-when (:compile-toplevel :load-toplevel :execute)
;; #+swank (declaim (optimize (speed 3) (safety 2)))
#+swank (declaim (optimize (speed 0) (safety 3) (debug 3)))
#-swank (declaim (optimize (speed 3) (safety 0) (debug 0)))
#-swank (declaim (sb-ext:muffle-conditions sb-ext:compiler-note))
#-swank (sb-ext:disable-debugger))
;;;
;;; Reader Macros
;;;
(eval-when (:compile-toplevel :load-toplevel :execute)
(set-dispatch-macro-character
#\# #\f
#'(lambda (stream c2 n)
(declare (ignore c2 n))
(let ((form (read stream t nil t)))
`(lambda (&optional %) (declare (ignorable %)) ,form))))
(set-dispatch-macro-character
#\# #\>
#'(lambda (stream c2 n)
(declare (ignore c2 n))
(let ((form (read stream t nil t)))
(declare (ignorable form))
#-swank nil
#+swank (if (atom form)
`(format *error-output* "~a => ~a~&" ',form ,form)
`(format *error-output* "~a => ~a~&" ',form `(,,@form)))))))
;;;
;;; Libraries
;;;
;;;
;;; BOF
;;;
(defpackage randomized-heap
(:use #:cl)
(:nicknames #:rh)
(:shadow #:count)
(:export #:make-randomized-heap
#:empty-p
#:push!
#:pop!
#:peak
#:count
#:do-all-kvs
#:prune!))
(in-package #:randomized-heap)
(eval-when (:compile-toplevel :load-toplevel :execute)
(defvar *OPT*
#+swank '(optimize (speed 3) (safety 2) (debug 3))
#-swank '(optimize (speed 3) (safety 0) (debug 0))))
(declaim (inline %make-node make-randomized-heap))
(defstruct (node (:constructor %make-node)
(:conc-name %n-))
(key nil :type fixnum)
(value nil :type t)
(children (make-array 2 :element-type '(or null node)
:initial-element nil)
:type (simple-array (or null node) (2))))
(defstruct (randomized-heap (:constructor make-randomized-heap (&optional (compare #'sb-impl::two-arg-<) (key-fn #'identity))))
(root nil :type (or null node))
(count 0 :type (integer 0 #.most-positive-fixnum))
(comparator compare :type (function (fixnum fixnum) boolean))
(key-fn key-fn :type (function (t) fixnum)))
(defun count (heap)
(randomized-heap-count heap))
(declaim (inline %direction))
(defun %direction ()
(declare #.*OPT*)
(random 2))
(defun meld (l r comparator)
(declare #.*OPT*
((or null node) l r)
((function (fixnum fixnum) boolean) comparator))
(cond
((or (null l)
(null r))
(or l r))
((funcall comparator
(%n-key l)
(%n-key r))
;; l is root
(let ((dir (%direction)))
(setf (aref (%n-children l) dir)
(meld (aref (%n-children l) dir)
r
comparator))
l))
(t
;; r is root
(let ((dir (%direction)))
(setf (aref (%n-children r) dir)
(meld l
(aref (%n-children r) dir)
comparator))
r))))
(declaim (inline peak))
(defun peak (heap)
(declare #.*OPT*)
(let ((root (randomized-heap-root heap)))
(values (%n-value root)
(%n-key root))))
(defun empty-p (heap)
(null (randomized-heap-root heap)))
(declaim (inline pop! push!))
(defun pop! (heap)
(declare #.*OPT*)
(when (empty-p heap)
(error "heap is empty"))
(decf (randomized-heap-count heap))
(multiple-value-bind (value key)
(peak heap)
(let* ((children (%n-children (randomized-heap-root heap)))
(l (aref children 0))
(r (aref children 1)))
(setf (randomized-heap-root heap)
(meld l
r
(randomized-heap-comparator heap)))
(values value key))))
(defun push! (heap value)
(declare #.*OPT*)
(let ((key (funcall (randomized-heap-key-fn heap)
value)))
(incf (randomized-heap-count heap))
(setf (randomized-heap-root heap)
(meld (randomized-heap-root heap)
(%make-node :key key
:value value)
(randomized-heap-comparator heap))))
heap)
(defmacro do-all-kvs ((key value heap) &body body &environment env)
(let ((temp (gensym)))
(multiple-value-bind (args argvs res setter accessor)
(get-setf-expansion heap env)
`(let ((,temp (make-randomized-heap (randomized-heap-comparator ,accessor)
(randomized-heap-key-fn ,accessor))))
(loop :until (empty-p ,accessor)
:do (multiple-value-bind (,value ,key)
(pop! ,accessor)
(progn ,@body)
(push! ,temp ,value)))
(let* (,@(mapcar #'list args argvs)
(,(car res) ,temp))
,setter
nil)))))
(defun prune! (heap cnt)
(let ((new-root nil)
(comparator (randomized-heap-comparator heap)))
(dotimes (_ cnt)
(multiple-value-bind (v k) (pop! heap)
(setf new-root
(meld new-root
(%make-node :key k :value v)
comparator))))
(setf (randomized-heap-root heap)
new-root)))
;;;
;;; EOF
;;;
;;;
;;; Macros
;;;
(in-package #:cl-user)
(defmacro awhen (test &body forms)
`(let ((it ,test))
(when it
,@forms)))
(defmacro while (test &body body)
`(loop while ,test do (progn ,@body)))
(defmacro eval-always (&body body)
`(eval-when (:compile-toplevel :load-toplevel :execute)
,@body))
;;;
;;; Body
;;;
(in-package #:cl-user)
(defmacro %expander-body (form cases)
`(ecase ,form
,@(loop for (from . to) in cases
collect `(,from ,to))))
(defmacro define-ecase-expander (name assoc-list)
`(defmacro ,name (form)
`(%expander-body ,form ,',assoc-list)))
(eval-always
(defconstant +planet-amount+ 100)
(defconstant +station-amount+ 8)
(defconstant +all-amount+ (+ +planet-amount+ +station-amount+))
(defconstant +alpha+ 5))
(deftype coord () '(unsigned-byte 32))
(declaim (inline y x))
(defun make-coord (y x)
#+swank (assert (<= 0 y 1000) () "y is out of range")
#+swank (assert (<= 0 x 1000) () "x is out of range")
(dpb y '#.(byte 16 16) x))
(defun y (c) (ldb (byte 16 16) c))
(defun x (c) (ldb (byte 16 0) c))
#+nil (y (make-coord 1000 0))
#+nil (x (make-coord 0 1000))
(deftype planets () '(simple-array coord (*)))
(defun read-input ()
(let ((n (read))
(m (read))
(planets (make-array +planet-amount+ :element-type 'coord)))
(declare (ignore n m))
(dotimes (i +planet-amount+)
(setf (aref planets i)
(make-coord (read) (read))))
planets))
(deftype stations ()
'(simple-array coord (*)))
(deftype orders ()
"planetsはid0〜99, stationsはid100〜107
最初と最後はid0でないといけない"
'(simple-array fixnum (*)))
(defun make-station-coords (planets)
;; TODO いい感じの場所に置く
(declare (ignore planets))
(let ((res (make-array +station-amount+ :element-type 'coord)))
(dotimes (i +station-amount+)
(setf (aref res i)
(make-coord (random 1001) (random 1001))))
res))
(defconstant +inf+ #.(ash 1 60))
(deftype %costs () '(simple-array fixnum (* *)))
(defun %planet-id-p (id)
(< id +planet-amount+))
(defun %squared-euclid-distance (c1 c2)
(let* ((dy (- (y c1) (y c2)))
(dx (- (x c1) (x c2))))
(+ (* dy dy)
(* dx dx))))
(defun %get-nearest-costs-and-paths-from (start planets stations)
;; dijkstra法を利用して最小コストを求めたい
;; 途中でステーションを経由してもいいが、最終的に欲しいのは惑星間の移動コストとpath
(let ((costs (make-array +all-amount+ :element-type 'fixnum
:initial-element +inf+))
(paths (make-array +all-amount+ :element-type 'list
:initial-element nil))
(heap (rh:make-randomized-heap #'< #'first)))
(rh:push! heap (list 0 (list start)))
(while (not (rh:empty-p heap))
(destructuring-bind (cost path) (rh:pop! heap)
(let ((node (first path)))
(when (<= cost (aref costs node))
(setf (aref costs node) cost)
(setf (aref paths node) path)
(dotimes (next +all-amount+)
(let* ((coord (if (%planet-id-p node)
(aref planets node)
(aref stations (- node +planet-amount+))))
(new-coord (if (%planet-id-p next)
(aref planets next)
(aref stations (- next +planet-amount+))))
(nc (+ cost
(* (if (%planet-id-p node)
+alpha+
1)
(if (%planet-id-p next)
+alpha+
1)
(%squared-euclid-distance coord new-coord)))))
(when (< nc (aref costs next))
(setf (aref costs next) nc
(aref paths next) (cons next path))
(rh:push! heap (list nc (cons next path))))))))))
(list costs paths)))
(defun %get-each-node-costs-and-paths (get-cost-and-path)
;; floyd-warshall method
;; TODO 各頂点の移動では他の頂点を経由していいとする
;; TODO 事前にdijkstraで各頂点間の最短距離を求めておく
(let ((costs (make-array (list +planet-amount+ +planet-amount+)
:element-type 'fixnum
:initial-element +inf+))
(paths (make-array (list +planet-amount+ +planet-amount+)
:element-type 'list
:initial-element nil)))
(declare (%costs costs))
(dotimes (i +planet-amount+)
(dotimes (j +planet-amount+)
(multiple-value-bind (cost path) (funcall get-cost-and-path i j)
(setf (aref costs i j) cost
(aref paths i j) (reverse path)))))
#>costs
(dotimes (k +planet-amount+)
(dotimes (i +planet-amount+)
(dotimes (j +planet-amount+)
(let ((current (aref costs i j))
(cand (+ (aref costs i k)
(aref costs k j))))
(when (< cand current)
(setf (aref costs i j) cand
;; 計算量大丈夫？O(n^4)な気がする
(aref paths i j) (append (aref paths i k)
(rest (aref paths k j)))))))))
(values costs paths)))
(defun make-orders (planets stations)
;; 各惑星間の距離を求めて Nearest Neighbor で貪欲に解く
;; TODO ステーションを使う
;; TODO TSPを解く
(let ((costs-and-paths-from (coerce
(loop for i below +planet-amount+
collect (%get-nearest-costs-and-paths-from i planets stations))
'vector)))
(multiple-value-bind (costs paths) (%get-each-node-costs-and-paths
(lambda (from to)
(destructuring-bind (cs ps) (aref costs-and-paths-from from)
(values (aref cs to)
(aref ps to)))))
(let ((ps nil)
(visited (make-hash-table)))
(setf (gethash 0 visited) t)
(loop repeat (1- +planet-amount+) with now = 0 do
(let ((nearest -1)
(nearest-path nil)
(min-dist +inf+))
(dotimes (next +planet-amount+)
(let ((path (aref paths now next))
(cost (aref costs now next)))
(when (and (not (gethash next visited))
(< cost min-dist))
(setf nearest next
nearest-path path
min-dist cost))))
#>(now nearest)
(setf now nearest
(gethash now visited) t)
(push nearest-path ps)))
(push (list 0 0) ps)
#>ps
(coerce (cons 0 (apply #'concatenate 'list (mapcar #'rest (reverse ps))))
'orders)))))
(defun print-ans (stations orders)
(declare (orders orders)
(stations stations))
#>orders
;; stations
(sb-int:dovector (c stations)
(format t "~a ~a~%" (y c) (x c)))
(format t "~a ~%" (length orders))
;; orders
(sb-int:dovector (o orders)
(multiple-value-bind (type id)
(if (< o +planet-amount+)
(values 1 o)
(values 2 (- o +planet-amount+)))
(format t "~a ~a~%" type (1+ id)))))
(defun main ()
(let* ((planets (read-input))
(stations (make-station-coords planets))
(orders (make-orders planets stations)))
(print-ans stations orders)))
#-swank (main)
;;;
;;; Debug
;;;
;; Raise error on warning at compile time
#+(and sbcl (not swank))
(eval-when (:compile-toplevel)
(when (or (plusp sb-c::*compiler-warning-count*)
sb-c::*undefined-warnings*)
(error "compiler-error-count:~a, undefined warnings:~a"
sb-c::*compiler-warning-count*
sb-c::*undefined-warnings*)))
#+swank
(defun run-sample (infile outfile &optional (out *standard-output*) (vis t))
(let ((args (append
(list "tester.dll" "judge" "-i" infile "-o" outfile)
(when vis (list "-v" "vis.png")))))
(with-open-file (*standard-input* infile :direction :input)
(with-open-file (*standard-output* outfile :direction :output
:if-exists :supersede)
(main))
(sb-ext:run-program "dotnet" args
:output out
:search t
:error *error-output*))))