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author | HJ <thechairman@thechairman.info> | 2023-01-17 12:46:04 -0500 |
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committer | HJ <thechairman@thechairman.info> | 2023-01-17 12:46:04 -0500 |
commit | fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1 (patch) | |
tree | d586a28650cbbfb20ece931a85bcce4c29e5e40b /leetcode/lc-657-robot-return.rkt | |
parent | bc5387512ba529072338648d6337ddab731b8b8c (diff) | |
download | gleam_aoc-fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1.tar.gz gleam_aoc-fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1.zip |
adding old leetcode solutions
Diffstat (limited to 'leetcode/lc-657-robot-return.rkt')
-rw-r--r-- | leetcode/lc-657-robot-return.rkt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/leetcode/lc-657-robot-return.rkt b/leetcode/lc-657-robot-return.rkt new file mode 100644 index 0000000..908605a --- /dev/null +++ b/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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