diff options
Diffstat (limited to 'leetcode/lc-217-contains-duplicate.rkt')
| -rw-r--r-- | leetcode/lc-217-contains-duplicate.rkt | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/leetcode/lc-217-contains-duplicate.rkt b/leetcode/lc-217-contains-duplicate.rkt deleted file mode 100644 index ca8d193..0000000 --- a/leetcode/lc-217-contains-duplicate.rkt +++ /dev/null @@ -1,12 +0,0 @@ -#lang racket -(define/contract (contains-duplicate nums) - (-> (listof exact-integer?) boolean?) - (define nums-hash (make-hash)) - (define (check-next-number nums) - (cond [(empty? nums) #false] - [(hash-ref nums-hash (car nums) #false) #true] - [else (hash-set! nums-hash (car nums) #true) - (check-next-number (cdr nums))])) - (check-next-number nums)) - -(contains-duplicate '(1 2 3))
\ No newline at end of file |