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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-657-robot-return.rkt | |
| parent | 6156a9ef7be4012063a042aafb4e9b0d7eadde8e (diff) | |
| download | gleam_aoc-8777ff071f7bb37631baa7b6717ad29961e50911.tar.gz gleam_aoc-8777ff071f7bb37631baa7b6717ad29961e50911.zip | |
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Diffstat (limited to 'racket/leetcode/lc-657-robot-return.rkt')
| -rw-r--r-- | racket/leetcode/lc-657-robot-return.rkt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/racket/leetcode/lc-657-robot-return.rkt b/racket/leetcode/lc-657-robot-return.rkt new file mode 100644 index 0000000..908605a --- /dev/null +++ b/racket/leetcode/lc-657-robot-return.rkt @@ -0,0 +1,17 @@ +#lang racket + +(define/contract (judge-circle moves) + (-> string? boolean?) + (equal? '(0 0) + (for/fold ([y-pos 0] + [x-pos 0] + #:result (list y-pos x-pos)) + ([move (map string (string->list moves))]) + (values (case move + [("U") (add1 y-pos)] + [("D") (sub1 y-pos)] + [else y-pos]) + (case move + [("L") (add1 x-pos)] + [("R") (sub1 x-pos)] + [else x-pos])))))
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