From 1c147396427dbd05abadb4c1bbf9a60bb49770ec Mon Sep 17 00:00:00 2001
From: Oscar Najera <hi@oscarnajera.com>
Date: Sun, 3 Dec 2023 18:11:24 +0100
Subject: [AoC2023] day01 lisp fail 2nd

---
 AoC2023/day01/solver.lisp | 71 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 AoC2023/day01/solver.lisp

(limited to 'AoC2023/day01/solver.lisp')

diff --git a/AoC2023/day01/solver.lisp b/AoC2023/day01/solver.lisp
new file mode 100644
index 0000000..443bcc0
--- /dev/null
+++ b/AoC2023/day01/solver.lisp
@@ -0,0 +1,71 @@
+(ql:quickload '(uiop fiveam cl-ppcre))
+
+(defvar eg-input "1abc2
+pqr3stu8vwx
+a1b2c3d4e5f
+treb7uchet")
+
+(defvar eg-input2 "two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen")
+
+(defun get-pair (string)
+  (loop with first and last and num = 0
+        for c across string
+        when (digit-char-p c)
+          do (progn (setf last c)
+                    (when (= 1 (incf num))
+                      (setf first c)))
+        finally (return
+                  (parse-integer
+                   (concatenate 'string (list first last))))))
+
+(defun translate (word)
+  (alexandria:eswitch (word :test (lambda (val opts) (member val opts :test #'string-equal)))
+    ('("1" "one") 1)
+    ('("2" "two") 2)
+    ('("3" "three") 3)
+    ('("4" "four") 4)
+    ('("5" "five") 5)
+    ('("6" "six") 6)
+    ('("7" "seven") 7)
+    ('("8" "eight") 8)
+    ('("9" "nine") 9)))
+
+(defparameter numbers-re "[1-9]|one|two|three|four|five|six|seven|eight|nine")
+
+(defun line-value (string)
+  (let ((res
+          (mapcar #'translate
+                  (cl-ppcre:all-matches-as-strings numbers-re string))))
+    (+ (* 10 (car res)) (car (last res)))))
+
+(defun solver1 (lines)
+  (reduce #'+ lines :key #'get-pair))
+
+(defun solver2 (lines)
+  (reduce #'+ lines :key #'line-value :start 0))
+
+(fiveam:test solutions
+  (fiveam:is
+   (= 142
+      (solver1 (uiop:split-string eg-input :separator '(#\Newline)))))
+  (fiveam:is
+   (= 55172
+      (solver1 (uiop:read-file-lines "input"))))
+  (fiveam:is
+   (= 281
+      (solver2 (uiop:split-string eg-input2 :separator '(#\Newline)))))
+  (fiveam:is
+   (= 54953
+      (solver2 (uiop:read-file-lines "input")))))
+
+(uiop:with-output-file (sol "solut")
+  (let ((ser 0))
+    (loop for line in (uiop:read-file-lines "input")
+          for val = (line-value line) do
+            (format sol "~d ~d ~a~%" (incf ser val) val line))))
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