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| author | HJ <thechairman@thechairman.info> | 2023-01-17 12:46:04 -0500 |
|---|---|---|
| committer | HJ <thechairman@thechairman.info> | 2023-01-17 12:46:04 -0500 |
| commit | fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1 (patch) | |
| tree | d586a28650cbbfb20ece931a85bcce4c29e5e40b /leetcode/lc-1207-unique-occurences.rkt | |
| parent | bc5387512ba529072338648d6337ddab731b8b8c (diff) | |
| download | gleam_aoc-fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1.tar.gz gleam_aoc-fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1.zip | |
adding old leetcode solutions
Diffstat (limited to 'leetcode/lc-1207-unique-occurences.rkt')
| -rw-r--r-- | leetcode/lc-1207-unique-occurences.rkt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/leetcode/lc-1207-unique-occurences.rkt b/leetcode/lc-1207-unique-occurences.rkt new file mode 100644 index 0000000..1b4d107 --- /dev/null +++ b/leetcode/lc-1207-unique-occurences.rkt @@ -0,0 +1,10 @@ +#lang racket +(define/contract (unique-occurrences arr) + (-> (listof exact-integer?) boolean?) + (define occurrences (make-hash)) + (for ([n (in-list arr)]) + (hash-update! occurrences n add1 1)) + (equal? (hash-values occurrences) + (remove-duplicates (hash-values occurrences)))) + +(unique-occurrences '(1 2 2 1 1 3))
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