src/2019/days/day-01.lisp @ 35ad1f73c754
Add scratch.md to .hgignore
author |
Steve Losh <steve@stevelosh.com> |
date |
Wed, 08 Dec 2021 21:47:32 -0800 |
parents |
182bdd87fd9e |
children |
(none) |
(advent:defpackage* :advent/2019/01)
(in-package :advent/2019/01)
(defun fuel-required (module-mass)
(max 0 (- (floor module-mass 3) 2)))
(defun complete-fuel-required (module-mass)
(iterate
(for fuel :first (fuel-required module-mass) :then (fuel-required fuel))
(summing fuel)
(until (zerop fuel))))
(define-problem (2019 1) (data read-all) (3464458 5193796)
(values (summation data :key #'fuel-required)
(summation data :key #'complete-fuel-required)))
;# Scratch --------------------------------------------------------------------
;; (run)
;; (1am:run)