commit 904fe53545fc791e4a7ad69b514b0c06bf7fa583
parent f215bd7ae2f9b68897e60a6d6b8673529108e455
Author: Lukas Henkel <lh@entf.net>
Date: Sat, 3 Dec 2022 09:07:11 +0100
Day 3 task 1
Diffstat:
4 files changed, 349 insertions(+), 2 deletions(-)
diff --git a/adventofcode2022.asd b/adventofcode2022.asd
@@ -8,7 +8,8 @@
:depends-on ("trivia")
:components ((:file "main")
(:file "day01")
- (:file "day02")))
+ (:file "day02")
+ (:file "day03")))
(defsystem "adventofcode2022/test"
:description "My solutions to the advent of code 2022"
@@ -20,4 +21,5 @@
:depends-on ("adventofcode2022" "fiveam")
:components ((:file "package")
(:file "day01")
- (:file "day02")))
+ (:file "day02")
+ (:file "day03")))
diff --git a/input/day03.txt b/input/day03.txt
@@ -0,0 +1,300 @@
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diff --git a/src/day03.lisp b/src/day03.lisp
@@ -0,0 +1,30 @@
+(defpackage #:adventofcode2022/day03
+ (:use #:cl #:adventofcode2022))
+(in-package #:adventofcode2022/day03)
+
+(defun task1 (inputs)
+ (loop for input in inputs
+ sum (let ((compartment1 (car input))
+ (compartment2 (cdr input))
+ (result))
+ (loop for item1 across compartment1
+ for item2 across compartment2
+ when (find item1 compartment2 :test #'equal)
+ do (progn
+ (setf result item1)
+ (loop-finish))
+ when (find item2 compartment1 :test #'equal)
+ do (progn
+ (setf result item2)
+ (loop-finish)))
+ (if (char>= result #\a)
+ (- (char-code result) 96)
+ (- (char-code result) 38)))))
+
+(define-day 3
+ (:translate-input (lambda (line)
+ (let ((compartment-size (/ (length line) 2)))
+ (cons (subseq line 0 compartment-size)
+ (subseq line compartment-size)))))
+ #'task1
+ nil)
diff --git a/t/day03.lisp b/t/day03.lisp
@@ -0,0 +1,15 @@
+(in-package #:adventofcode2022/test)
+
+(defconstant +testdata-day03+ "vJrwpWtwJgWrhcsFMMfFFhFp
+jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
+PmmdzqPrVvPwwTWBwg
+wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
+ttgJtRGJQctTZtZT
+CrZsJsPPZsGzwwsLwLmpwMDw")
+
+(def-test day03-task1 ()
+ (is-true
+ (= 157
+ (run-task 3 1
+ (make-string-input-stream +testdata-day03+)))))
+
