結果

問題 No.2629 A replace B replace C
コンテスト
ユーザー norioc
提出日時 2025-07-07 20:00:21
言語 Scheme
(Gauche-0.9.15)
結果
WA  
実行時間 -
コード長 3,930 bytes
コンパイル時間 474 ms
コンパイル使用メモリ 8,612 KB
実行使用メモリ 48,268 KB
最終ジャッジ日時 2025-07-07 20:00:44
合計ジャッジ時間 22,917 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
sample AC * 5
other AC * 45 WA * 16
権限があれば一括ダウンロードができます

ソースコード

diff # 

(use util.match)
(use srfi.13)  ; string
(use srfi.42)  ; list-ec
(use srfi.197) ; chain
(use gauche.collection)
(use gauche.dictionary)
(use gauche.generator)
(use gauche.sequence)
(use scheme.list)
(use scheme.set)

(define input read-line)

(define (ii)
  (string->number (read-line)))

(define (li)
  (let ((s (read-line)))
    (map string->number (string-split s " "))))

(define (prn . args)
  (for-each-with-index (lambda (i x)
                         (when (> i 0)
                           (display " "))
                         (display x))
                       args)
  (newline))

(define prn* (pa$ apply prn))

(define int string->number)
(define str x->string)

(define-method min ((xs <sequence>))
  (fold min (~ xs 0) xs))
(define-method max ((xs <sequence>))
  (fold max (~ xs 0) xs))

(define (minmax . xs)
  (values->list (apply min&max xs)))
(define-method minmax ((xs <sequence>))
  (values->list (apply min&max xs)))

(define (sum xs)
  (fold + 0 xs))

(define (divmod a b)
  (values->list (div-and-mod a b)))

(define (1+ n) (+ n 1))
(define (1- n) (- n 1))
(define (!= a b) (not (= a b)))

(define pow
  (case-lambda
   ((a b) (expt a b))
   ((a b m) (expt-mod a b m))))

(define gcd* (apply$ gcd))
(define isqrt exact-integer-sqrt)

(define ++ string-append)

(define zip (map$ list))
(define all every)

(define (pairwise xs)
  (zip xs (cdr xs)))

(define (comb n k)
  (if (or (< k 0) (> k n))
      0
      (let loop ((i 0)
                 (x 1))
        (if (= i k)
            x
            (loop (1+ i) (div (* x (- n i)) (1+ i)))))))

(define-method frequencies ((xs <sequence>))
  (rlet1 ht (make-hash-table eqv-comparator)
    (for-each (^x (hash-table-update! ht x 1+ 0))
              xs)))

(define (yn b)
  (prn (if b "Yes" "No")))

(define-macro (input! bindings . body)
  (let loop ((bs (reverse bindings))
             (res '()))
    (if (null? bs)
        `(let*-values ,res
           ,@body)
        (cond
         ((symbol? (car bs))
          (loop (cdr bs)
                (cons `((,(car bs)) (values (ii)))
                      res)))
         ((list? (car bs))
          (loop (cdr bs)
                (cons `(,(car bs) (apply values (li)))
                      res)))
         (else
          'error)))))

(define mlet1 match-let1)

(define-macro (mfn pat . body)
  (let ((arg (gensym)))
    `(lambda (,arg)
       (mlet1 ,pat ,arg
         ,@body))))

(define-syntax count-ec
  (syntax-rules ()
    ((_ qualifiers ...)
     (sum-ec qualifiers ... 1))))

(define (len obj)
  (cond
   ((list? obj) (length obj))
   ((string? obj) (string-length obj))
   (else
    (assume #f))))

(define (accum xs)
  (define (proc a b)
    (let1 t (+ a b)
      (values t t)))
  (map-accum proc 0 xs))

(define (digits n)
  (map digit->integer (str n)))

(define (-> x . fns)
  (call-with-values (^() (values x))
    (apply compose (reverse fns))))

(define (rep n thunk)
  (list-tabulate n (^i (thunk))))

(define (zip-longest . args)
  (let* ((n (apply max (map length args)))
         (xxs (map (^(xs)
                     (append xs (make-list (- n (length xs)) #f)))
                   args)))
    (map (pa$ delete #f)
         (apply zip xxs))))

(define (set-from xs)
  (apply set eqv-comparator xs))

(define (difference xs ys)
  (let ((excludes (set-from ys)))
    (filter (^x (not (set-contains? excludes x))) xs)))

(let* ((N (ii))
       (S (input))
       (T (input)))
  (let ((d (map (mfn (a b)
                  (let ((x (char->integer a))
                        (y (char->integer b)))
                    (- y x)))
                (zip S T))))
    (->
     (cond
      ((find negative? d) #f)
      (else
       (let ((freq (frequencies d)))
         (cond
          ((= (dict-get freq 1 0) (dict-get freq 2 0)) #t)
          ((and (zero? (dict-get freq 2 0))
                (zero? (mod (dict-get freq 1 0) 2)))
           #t)
          (else
           #f)))))
     yn)))
0