結果
| 問題 | No.274 The Wall |
| ユーザー |
 sansaqua
|
| 提出日時 | 2019-09-17 23:25:10 |
| 言語 | Common Lisp (sbcl 2.3.8) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 8,142 bytes |
| コンパイル時間 | 163 ms |
| コンパイル使用メモリ | 61,040 KB |
| 実行使用メモリ | 839,460 KB |
| 最終ジャッジ日時 | 2024-07-07 13:54:00 |
| 合計ジャッジ時間 | 5,134 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge5 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 11 ms
27,560 KB |
| testcase_01 | AC | 11 ms
27,688 KB |
| testcase_02 | AC | 11 ms
31,804 KB |
| testcase_03 | AC | 788 ms
239,468 KB |
| testcase_04 | AC | 11 ms
27,560 KB |
| testcase_05 | AC | 10 ms
27,564 KB |
| testcase_06 | AC | 11 ms
27,432 KB |
| testcase_07 | AC | 11 ms
27,560 KB |
| testcase_08 | AC | 10 ms
27,560 KB |
| testcase_09 | AC | 10 ms
27,564 KB |
| testcase_10 | AC | 12 ms
29,520 KB |
| testcase_11 | MLE | - |
| testcase_12 | -- | - |
| testcase_13 | -- | - |
| testcase_14 | -- | - |
| testcase_15 | -- | - |
| testcase_16 | -- | - |
| testcase_17 | -- | - |
| testcase_18 | -- | - |
| testcase_19 | -- | - |
| testcase_20 | -- | - |
| testcase_21 | -- | - |
| testcase_22 | -- | - |
| testcase_23 | -- | - |
| testcase_24 | -- | - |
| testcase_25 | -- | - |
コンパイルメッセージ
; compiling file "/home/judge/data/code/Main.lisp" (written 07 JUL 2024 01:53:55 PM): ; file: /home/judge/data/code/Main.lisp ; in: DEFUN MAIN ; (+ J (* 2 N)) ; ; note: doing signed word to integer coercion (cost 20), for: ; the first result of inline (signed-byte 64) arithmetic ; ; note: doing signed word to integer coercion (cost 20), for: ; the first result of inline (signed-byte 64) arithmetic ; ; compilation unit finished ; printed 2 notes ; wrote /home/judge/data/code/Main.fasl ; compilation finished in 0:00:00.086
ソースコード
;; -*- coding: utf-8 -*-
(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)) (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
(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)
;;;
;;; Disjoint set by Union-Find algorithm
;;;
(defstruct (disjoint-set
(:constructor make-disjoint-set
(size &aux (data (make-array size :element-type 'int32 :initial-element -1))))
(:conc-name ds-))
(data nil :type (simple-array int32 (*))))
(declaim (ftype (function * (values (mod #.array-total-size-limit) &optional)) ds-root))
(defun ds-root (x disjoint-set)
"Returns the root of X."
(declare #.OPT
((mod #.array-total-size-limit) x))
(let ((data (ds-data disjoint-set)))
(if (< (aref data x) 0)
x
(setf (aref data x)
(ds-root (aref data x) disjoint-set)))))
(declaim (inline ds-unite!))
(defun ds-unite! (x1 x2 disjoint-set)
"Destructively unites X1 and X2 and returns true iff X1 and X2 become
connected for the first time."
(let ((root1 (ds-root x1 disjoint-set))
(root2 (ds-root x2 disjoint-set)))
(unless (= root1 root2)
(let ((data (ds-data disjoint-set)))
;; ensure the size of root1 >= the size of root2
(when (> (aref data root1) (aref data root2))
(rotatef root1 root2))
(incf (aref data root1) (aref data root2))
(setf (aref data root2) root1)))))
(declaim (inline ds-connected-p))
(defun ds-connected-p (x1 x2 disjoint-set)
"Returns true iff X1 and X2 have the same root."
(= (ds-root x1 disjoint-set) (ds-root x2 disjoint-set)))
(declaim (ftype (function * (values fixnum &optional)) read-fixnum))
(defun read-fixnum (&optional (in *standard-input*))
(declare #.OPT)
(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 #\-))
(setf 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))))))))
;;;
;;; Strongly connected components of directed graph
;;;
(defstruct (scc (:constructor %make-scc (graph revgraph posts components sizes count)))
(graph nil :type (simple-array list (*)))
;; reversed graph
(revgraph nil :type (simple-array list (*)))
;; vertices by post-order DFS
posts
;; components[i] := strongly connected component of the i-th vertex
(components nil :type (simple-array (unsigned-byte 32) (*)))
;; sizes[k] := size of the k-th strongly connected component
(sizes nil :type (simple-array (unsigned-byte 32) (*)))
;; the total number of strongly connected components
(count 0 :type (unsigned-byte 32)))
(declaim (inline %make-revgraph))
(defun %make-revgraph (graph)
(let* ((n (length graph))
(revgraph (make-array n :element-type 'list :initial-element nil)))
(dotimes (i n)
(dolist (dest (aref graph i))
(push i (aref revgraph dest))))
revgraph))
(defun make-scc (graph &optional revgraph)
"GRAPH := vector of adjacency lists
REVGRAPH := NIL | reversed graph of GRAPH"
(declare #.OPT
((simple-array list (*)) graph)
((or null (simple-array list (*))) revgraph))
(let* ((revgraph (or revgraph (%make-revgraph graph)))
(n (length graph))
(visited (make-array n :element-type 'bit :initial-element 0))
(posts (make-array n :element-type '(unsigned-byte 32)))
(components (make-array n :element-type '(unsigned-byte 32)))
(sizes (make-array n :element-type '(unsigned-byte 32)
:initial-element 0))
(pointer 0)
(ord 0) ; ordinal number for a strongly connected component
)
(declare ((unsigned-byte 32) pointer ord))
(assert (= n (length revgraph)))
(labels ((dfs (v)
(setf (aref visited v) 1)
(dolist (neighbor (aref graph v))
(when (zerop (aref visited neighbor))
(dfs neighbor)))
(setf (aref posts pointer) v)
(incf pointer))
(reversed-dfs (v ord)
(setf (aref visited v) 1
(aref components v) ord)
(incf (aref sizes ord))
(dolist (neighbor (aref revgraph v))
(when (zerop (aref visited neighbor))
(reversed-dfs neighbor ord)))))
(dotimes (v n)
(when (zerop (aref visited v))
(dfs v)))
(fill visited 0)
(loop for i from (- n 1) downto 0
for v = (aref posts i)
when (zerop (aref visited v))
do (reversed-dfs v ord)
(incf ord))
(%make-scc graph revgraph posts components sizes ord))))
(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))
(m (read))
(dset (make-disjoint-set (+ n n m)))
(graph (make-array (* 4 n) :element-type 'list :initial-element nil)))
(declare (uint16 n m))
(dotimes (i n)
(let* ((l (read-fixnum))
(r (read-fixnum)))
(loop for j from l to r
do (ds-unite! i (+ j (* 2 n)) dset))
(loop for j from (- m r 1) to (- m l 1)
do (ds-unite! (+ i n) (+ j (* 2 n)) dset))))
(labels ((negate (x)
(declare (uint16 x))
(mod (+ x (* 2 n)) (* 4 n)))
(add-clause! (literal1 literal2 bool1 bool2)
(unless bool1
(setq literal1 (negate literal1)))
(unless bool2
(setq literal2 (negate literal2)))
(push literal2 (aref graph (negate literal1)))
(push literal1 (aref graph (negate literal2)))))
(gc)
(dotimes (x (* 2 n))
(loop for y from (+ x 1) below (* 2 n)
do (when (and (ds-connected-p x y dset)
(/= (+ x n) y))
(add-clause! x y nil nil))))
(dotimes (x n)
(add-clause! x (+ x n) t t)
(add-clause! x (+ x n) nil nil))
(let* ((scc (make-scc graph))
(comps (scc-components scc)))
(write-line
(if (loop for x below (* 2 n)
thereis (= (aref comps x)
(aref comps (+ x (* 2 n)))))
"NO"
"YES"))))))
#-swank (main)