1 files changed, 22 insertions, 0 deletions
diff --git a/day1.scm b/day1.scm
new file mode 100755
index 0000000..ca79a09
--- /dev/null
+++ b/day1.scm
@@ -0,0 +1,22 @@
+#!/usr/bin/env gosh
+(use file.util)
+
+(define (read-input filename)
+  (map string->number (file->string-list filename)))
+
+(define (part1 input)
+  (fold + 0 (map (lambda (x) (- (floor (/ x 3)) 2)) input)))
+
+(define (calculate-fuel weight acc)
+  (if (< weight 9)
+    acc
+    (let ((fuel-weight (- (floor (/ weight 3)) 2)))
+      (calculate-fuel fuel-weight (+ acc fuel-weight)))))
+
+(define (part2 input)
+  (fold + 0 (map (lambda (x) (calculate-fuel x 0)) input)))
+
+(define (main args)
+  (let ((input (read-input "inputs/day1.txt")))
+    (print (part1 input))
+    (print (part2 input))))