diff options
Diffstat (limited to 'leetcode/lc-766-toeplitz-matrix.rkt')
| -rw-r--r-- | leetcode/lc-766-toeplitz-matrix.rkt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/leetcode/lc-766-toeplitz-matrix.rkt b/leetcode/lc-766-toeplitz-matrix.rkt new file mode 100644 index 0000000..5606d2a --- /dev/null +++ b/leetcode/lc-766-toeplitz-matrix.rkt @@ -0,0 +1,9 @@ +#lang racket + +(define/contract (is-toeplitz-matrix matrix) + (-> (listof (listof exact-integer?)) boolean?) + (cond [(empty? (cdr matrix)) #true] + [(equal? (drop-right (car matrix) 1) + (drop (cadr matrix) 1)) + (is-toeplitz-matrix (cdr matrix))] + [else #false]))
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