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day 10 part 1 in common lisp

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cow 2022-12-28 03:47:10 -05:00
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1
common-lisp/day-10/example.txt Symbolic link
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../../input/day-10-example.txt

1
common-lisp/day-10/input.txt Symbolic link
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../../input/day-10.txt

60
common-lisp/day-10/solution.lisp Executable file
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#!/usr/bin/env -S sbcl --script
;; Copyright (C) 2022
;; This program is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
(require 'asdf)
(require 'uiop)
(require 'str)
(require 'iterate)
(defpackage :advent-of-code-day-10
(:use :cl :iterate)
(:import-from :uiop :read-file-lines))
(in-package :advent-of-code-day-10)
(defun signal-strength-at-cycle (instructions cycle)
(iter (for instruction in instructions)
(for noop? = (not (consp instruction)))
(for counter initially 1 then (+ counter (if noop? 1 2)))
(for register initially 1 then (if noop? register (+ register (cdr instruction))))
(for previous-counter previous counter)
(for previous-register previous register)
(when (> counter cycle)
(return (* cycle previous-register)))))
(defun parse-input (lines)
(iter (for line in lines)
(collect (if (string= line "noop")
:noop
(cons :addx (parse-integer (cadr (str:split " " line))))))))
(let ((input (parse-input (read-file-lines "example.txt"))))
(assert (= 420 (signal-strength-at-cycle input 20)))
(assert (= 1140 (signal-strength-at-cycle input 60)))
(assert (= 1800 (signal-strength-at-cycle input 100)))
(assert (= 2940 (signal-strength-at-cycle input 140)))
(assert (= 2880 (signal-strength-at-cycle input 180)))
(assert (= 3960 (signal-strength-at-cycle input 220)))
(assert (= 13140 (iter (for cycle from 20 to 220 by 40)
(sum (signal-strength-at-cycle input cycle))))))
(let ((input (parse-input (read-file-lines "input.txt"))))
(assert (= 14320 (iter (for cycle from 20 to 240 by 40)
(sum (signal-strength-at-cycle input cycle))))))
;; Local Variables:
;; mode: lisp
;; End:

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input/day-10-example.txt Normal file
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addx 15
addx -11
addx 6
addx -3
addx 5
addx -1
addx -8
addx 13
addx 4
noop
addx -1
addx 5
addx -1
addx 5
addx -1
addx 5
addx -1
addx 5
addx -1
addx -35
addx 1
addx 24
addx -19
addx 1
addx 16
addx -11
noop
noop
addx 21
addx -15
noop
noop
addx -3
addx 9
addx 1
addx -3
addx 8
addx 1
addx 5
noop
noop
noop
noop
noop
addx -36
noop
addx 1
addx 7
noop
noop
noop
addx 2
addx 6
noop
noop
noop
noop
noop
addx 1
noop
noop
addx 7
addx 1
noop
addx -13
addx 13
addx 7
noop
addx 1
addx -33
noop
noop
noop
addx 2
noop
noop
noop
addx 8
noop
addx -1
addx 2
addx 1
noop
addx 17
addx -9
addx 1
addx 1
addx -3
addx 11
noop
noop
addx 1
noop
addx 1
noop
noop
addx -13
addx -19
addx 1
addx 3
addx 26
addx -30
addx 12
addx -1
addx 3
addx 1
noop
noop
noop
addx -9
addx 18
addx 1
addx 2
noop
noop
addx 9
noop
noop
noop
addx -1
addx 2
addx -37
addx 1
addx 3
noop
addx 15
addx -21
addx 22
addx -6
addx 1
noop
addx 2
addx 1
noop
addx -10
noop
noop
addx 20
addx 1
addx 2
addx 2
addx -6
addx -11
noop
noop
noop

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input/day-10.txt Normal file
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noop
noop
noop
addx 6
noop
addx 30
addx -26
noop
addx 5
noop
noop
noop
noop
addx 5
addx -5
addx 6
addx 5
addx -1
addx 5
noop
noop
addx -14
addx -18
addx 39
addx -39
addx 25
addx -22
addx 2
addx 5
addx 2
addx 3
addx -2
addx 2
noop
addx 3
addx 2
addx 2
noop
addx 3
noop
addx 3
addx 2
addx 5
addx 4
addx -18
addx 17
addx -38
addx 5
addx 2
addx -5
addx 27
addx -19
noop
addx 3
addx 4
noop
noop
addx 5
addx -1
noop
noop
addx 4
addx 5
addx 2
addx -4
addx 5
noop
addx -11
addx 16
addx -36
noop
addx 5
noop
addx 28
addx -23
noop
noop
noop
addx 21
addx -18
noop
addx 3
addx 2
addx 2
addx 5
addx 1
noop
noop
addx 4
noop
noop
noop
noop
noop
addx 8
addx -40
noop
addx 7
noop
addx -2
addx 5
addx 2
addx 25
addx -31
addx 9
addx 5
addx 2
addx 2
addx 3
addx -2
noop
addx 3
addx 2
noop
addx 7
addx -2
addx 5
addx -40
addx 20
addx -12
noop
noop
noop
addx -5
addx 7
addx 7
noop
addx -1
addx 1
addx 5
addx 3
addx -2
addx 2
noop
addx 3
addx 2
noop
noop
noop
noop
addx 7
noop
noop
noop
noop