diff options
Diffstat (limited to 'leetcode/lc-788-rotated-digits.rkt')
| -rw-r--r-- | leetcode/lc-788-rotated-digits.rkt | 17 |
1 files changed, 0 insertions, 17 deletions
diff --git a/leetcode/lc-788-rotated-digits.rkt b/leetcode/lc-788-rotated-digits.rkt deleted file mode 100644 index 79400b8..0000000 --- a/leetcode/lc-788-rotated-digits.rkt +++ /dev/null @@ -1,17 +0,0 @@ -#lang racket - -(define/contract (rotated-digits max-n) - (-> exact-integer? exact-integer?) - (for/fold ([good-number-count 0]) - ([n (in-range 1 (add1 max-n))]) - (if (is-good? n) - (add1 good-number-count) - good-number-count))) - -(define/contract (is-good? test-number) - (-> exact-integer? boolean?) - (define test-string (number->string test-number)) - (match test-string - [(regexp #rx"^[018]*$") #false] - [(regexp #rx"^[0125689]*$") #true] - [_ #false]))
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