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| author | H.J <thechairman@thechairman.info> | 2024-10-09 11:36:55 -0400 |
|---|---|---|
| committer | H.J <thechairman@thechairman.info> | 2024-10-09 11:36:55 -0400 |
| commit | 8777ff071f7bb37631baa7b6717ad29961e50911 (patch) | |
| tree | 6d59c4ed58e454b960339c3d1151f0a879e8d7cb /racket/leetcode/lc-1436-destination-city.rkt | |
| parent | 6156a9ef7be4012063a042aafb4e9b0d7eadde8e (diff) | |
| download | gleam_aoc-8777ff071f7bb37631baa7b6717ad29961e50911.tar.gz gleam_aoc-8777ff071f7bb37631baa7b6717ad29961e50911.zip | |
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Diffstat (limited to 'racket/leetcode/lc-1436-destination-city.rkt')
| -rw-r--r-- | racket/leetcode/lc-1436-destination-city.rkt | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/racket/leetcode/lc-1436-destination-city.rkt b/racket/leetcode/lc-1436-destination-city.rkt new file mode 100644 index 0000000..ce82f08 --- /dev/null +++ b/racket/leetcode/lc-1436-destination-city.rkt @@ -0,0 +1,14 @@ +#lang racket +(define/contract (dest-city paths) + (-> (listof (listof string?)) string?) + (define city-pairs (make-hash paths)) + (define (go-to-next-city origin) + (let ([destination (hash-ref city-pairs origin #false)]) + (if destination + (go-to-next-city (car destination)) + origin))) + (go-to-next-city (caar paths))) + +(dest-city '(("London" "New York") + ("New York" "Lima") + ("Lima" "Sao Paolo")))
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