結果

問題 No.895 MESE
ユーザー MiyamonYMiyamonY
提出日時 2019-09-28 23:08:20
言語 Scheme
(Gauche-0.9.14)
結果
AC  
実行時間 1,619 ms / 2,000 ms
コード長 1,672 bytes
コンパイル時間 137 ms
コンパイル使用メモリ 6,944 KB
実行使用メモリ 37,584 KB
最終ジャッジ日時 2024-10-03 04:18:25
合計ジャッジ時間 41,899 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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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 1,324 ms
21,752 KB
testcase_01 AC 1,179 ms
22,008 KB
testcase_02 AC 1,177 ms
21,888 KB
testcase_03 AC 1,191 ms
22,016 KB
testcase_04 AC 1,205 ms
22,008 KB
testcase_05 AC 1,167 ms
22,144 KB
testcase_06 AC 1,293 ms
23,148 KB
testcase_07 AC 1,170 ms
23,940 KB
testcase_08 AC 1,178 ms
22,792 KB
testcase_09 AC 1,194 ms
22,276 KB
testcase_10 AC 1,177 ms
22,152 KB
testcase_11 AC 1,176 ms
24,080 KB
testcase_12 AC 1,205 ms
23,140 KB
testcase_13 AC 1,332 ms
27,840 KB
testcase_14 AC 1,520 ms
37,492 KB
testcase_15 AC 1,522 ms
37,496 KB
testcase_16 AC 1,393 ms
31,060 KB
testcase_17 AC 1,210 ms
25,248 KB
testcase_18 AC 1,580 ms
37,512 KB
testcase_19 AC 1,619 ms
37,420 KB
testcase_20 AC 1,562 ms
37,548 KB
testcase_21 AC 1,593 ms
37,584 KB
testcase_22 AC 1,570 ms
37,388 KB
testcase_23 AC 1,548 ms
37,376 KB
testcase_24 AC 1,543 ms
37,408 KB
testcase_25 AC 1,564 ms
37,396 KB
testcase_26 AC 1,557 ms
37,376 KB
testcase_27 AC 1,563 ms
37,448 KB
testcase_28 AC 1,594 ms
37,480 KB
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ソースコード

diff #

;;; File:  main.scm
;; Author: ymiyamoto
;;
;; Created on Sat Sep 28 20:04:17 2019
;;
(define-syntax read-number
  (syntax-rules ()
    ((_ nums)
     (define-values nums
       (apply values (map string->number (string-split (read-line) #\space)))))))

(define-syntax read-numbers
  (syntax-rules ()
    ((_ as)
     (define as (map string->number (string-split (read-line) #\space))))
    ((_ as n)
     (define as (map (lambda (_) (map string->number (string-split (read-line) #\space))) (iota n))))))

(define-syntax 1+ (syntax-rules () ((_ x) (+ x 1))))

(define-syntax 1- (syntax-rules () ((_ x) (- x 1))))

(define MOD 1000000007)

(define (mod+ x y)
  (modulo (+ x y) MOD))

(define (mod* x y)
  (modulo (* x y) MOD))

(define (make-comb num)
  (define fact-dp (make-vector num -1))
  (define inv-fact-dp (make-vector num -1))
  (define (fact n) (vector-ref fact-dp n))
  (define (inv-fact n) (vector-ref inv-fact-dp n))

  (vector-set! fact-dp 0 1)
  (vector-set! inv-fact-dp 0 1)
  (let loop ((i 1))
    (when (< i num)
      (vector-set! fact-dp i (mod* i (fact (1- i))))
      (vector-set! inv-fact-dp i (expt-mod (fact i) (- MOD 2) MOD))
      (loop (1+ i))))

  (lambda (n k)
    (define factn (fact n))
    (define powk (inv-fact k))
    (define pownk (inv-fact (- n k)))
    (mod* (mod* factn powk) pownk)))

(define (solve)
  (define comb (make-comb (* 3 100000)))
  (read-number (a b c))

  (print (fold mod+ 0
	       (map (lambda (i)
		      (define x (comb (- (+ a b c) i 2) (1- c)))
		      (define y (comb (- (+ a b) i 1) (1- b)))
		      (define z (1- (expt-mod 2 (- (+ a b c) i 1) MOD)))
		      (mod* (mod* x y) z))
		    (iota a 1)))))

(solve)
0