diff options
Diffstat (limited to 'leetcode/lc-747-largest-number-twice.rkt')
| -rw-r--r-- | leetcode/lc-747-largest-number-twice.rkt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/leetcode/lc-747-largest-number-twice.rkt b/leetcode/lc-747-largest-number-twice.rkt new file mode 100644 index 0000000..cea931b --- /dev/null +++ b/leetcode/lc-747-largest-number-twice.rkt @@ -0,0 +1,15 @@ +#lang racket +(define/contract (dominant-index nums) + (-> (listof exact-integer?) exact-integer?) + (if (empty? (cdr nums)) + 0 + (let* ([indexed-list + (map cons nums (range (length nums)))] + [sorted-indexed-list + (sort indexed-list > #:key car)]) + (if ((car (first sorted-indexed-list)) . >= . (* 2 (car (second sorted-indexed-list)))) + (cdr (first sorted-indexed-list)) + -1)))) + +(dominant-index '(3 6 1 0)) +(dominant-index '(0))
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