結果

問題 No.1217 せしすせそ
ユーザー norioc
提出日時 2025-07-05 14:48:49
言語 Scheme
(Gauche-0.9.15)
結果
AC  
実行時間 96 ms / 2,000 ms
コード長 2,879 bytes
コンパイル時間 237 ms
コンパイル使用メモリ 8,224 KB
実行使用メモリ 23,552 KB
最終ジャッジ日時 2025-07-05 14:48:53
合計ジャッジ時間 2,570 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge4
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ファイルパターン 結果
sample AC * 3
other AC * 10
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 scheme.list)
(use util.match)
(use srfi.13)  ; string
(use srfi.42)  ; list-ec
(use srfi.197) ; chain
(use gauche.collection)
(use gauche.generator)
(use gauche.sequence)

(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 isqrt exact-integer-sqrt)

(define ++ string-append)

(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 (pairwise xs)
  (zip xs (cdr 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 (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 (len obj)
  (cond
   ((list? obj) (length obj))
   ((string? obj) (string-length obj))
   (else
    (assume #f))))


(let ((lowercase (list-ec (: c #\a #\z) c)))
  (let ((S (input)))
    (mlet1 (a b) (find (mfn (a b) (not (eqv? a b)))
                       (zip lowercase (string->list S)))
      (prn #"~|a|to~|b|"))))
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