From fafbeaf9e3c09ba7a5bea7e47d5736001f8a5aa1 Mon Sep 17 00:00:00 2001 From: HJ Date: Tue, 17 Jan 2023 12:46:04 -0500 Subject: adding old leetcode solutions --- leetcode/lc-896-monotonic-array.rkt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 leetcode/lc-896-monotonic-array.rkt (limited to 'leetcode/lc-896-monotonic-array.rkt') diff --git a/leetcode/lc-896-monotonic-array.rkt b/leetcode/lc-896-monotonic-array.rkt new file mode 100644 index 0000000..fa43244 --- /dev/null +++ b/leetcode/lc-896-monotonic-array.rkt @@ -0,0 +1,16 @@ +#lang racket +(define/contract (is-monotonic test-list) + (-> (listof exact-integer?) boolean?) + (cond [(empty? (cdr test-list)) #true] + [((car test-list) . > . (cadr test-list)) + (is-monotonic-direction test-list >=)] + [((car test-list) . < . (cadr test-list)) + (is-monotonic-direction test-list <=)] + [else (is-monotonic (cdr test-list))])) + +(define/contract (is-monotonic-direction test-list dir) + (-> (listof exact-integer?) procedure? boolean?) + (cond [(empty? (cdr test-list)) #true] + [((car test-list) . dir . (cadr test-list)) + (is-monotonic-direction (cdr test-list) dir)] + [else #false])) \ No newline at end of file -- cgit v1.2.3