diff options
Diffstat (limited to 'leetcode/lc-645-set-mismatch.rkt')
| -rw-r--r-- | leetcode/lc-645-set-mismatch.rkt | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/leetcode/lc-645-set-mismatch.rkt b/leetcode/lc-645-set-mismatch.rkt deleted file mode 100644 index a9d9a61..0000000 --- a/leetcode/lc-645-set-mismatch.rkt +++ /dev/null @@ -1,24 +0,0 @@ -#lang racket - -(define/contract (find-error-nums nums) - (-> (listof exact-integer?) (listof exact-integer?)) - (define nums-set (list->set nums)) - (define range-set (apply set (range 1 (+ 2 (set-count nums-set))))) - (define missing-num (first (set->list (set-subtract range-set nums-set)))) - (define necessary-num - (if (set-member? nums-set (- missing-num 1)) - (+ missing-num 1) - (- missing-num 1))) - (list missing-num necessary-num)) - -(find-error-nums '(1 2 2 4)) - -(define fact-stream - (letrec ([f (lambda (x y) - (cond - [(zero? (modulo (- y 1) 3)) (cons (* 3 x) (lambda() (f (* x - y) (+ y 1))))] - [else (cons x (lambda() (f (* x y) (+ y 1))))]) - [else (cons x (lambda() (f (* x y) (+ y 1))))] - (lambda () (f 1 2)) - )])))
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