Data update

Task/Babbage-problem/Scheme/babbage-problem.scm

@@ -0,0 +1,24 @@
+(define (digits n)
+  (string->list (number->string n)))
+
+(define (ends-with list tail)
+  ;; does list end with tail?
+  (starts-with (reverse list)
+               (reverse tail)))
+
+(define (starts-with list head)
+  (cond ((null? head)
+         #t)
+        ((null? list)
+         #f)
+        ((equal? (car list) (car head))
+         (starts-with (cdr list) (cdr head)))
+        (else
+         #f)))
+
+(let loop ((i 1))
+  (if (ends-with (digits (* i i)) (digits 269696))
+      i
+      (loop (+ i 1))))
+
+;; 25264