1 files changed, 39 insertions, 0 deletions
diff --git a/2022/Day03/part-two.cl b/2022/Day03/part-two.cl
new file mode 100644
index 0000000..fcde7ed
--- /dev/null
+++ b/2022/Day03/part-two.cl
@@ -0,0 +1,39 @@
+(defvar *prog-input*)
+
+(let ((ui (read-line)))
+  (if (equal ui "")
+    (setq *prog-input* *standard-input*)
+    (setq *prog-input* (open ui))))
+
+(defun char-to-priority (c)
+  (if (and (char<= #\a c) (char<= c #\z))
+    (- (char-int c) 96)   ; (+  1 (- (char-int c) (char-int #\a))
+    (- (char-int c) 38))) ; (+ 27 (- (char-int c) (char-int #\A))
+
+(defun str-to-uniq-list (str)
+  (let ((out '()))
+    (loop for c across str do
+          (if (not (member c out))
+            (push c out)))
+    out))
+
+(let
+  ((inpt (read-line *prog-input* NIL)) (line-cnt 0) (encountered '()) (badge-prior 0))
+
+  (loop until (or (string= inpt "end") (not inpt)) do
+        (if (= line-cnt 0)
+          (setq encountered (str-to-uniq-list inpt))
+          (loop for c in encountered do
+                (if (not (find c inpt))
+                  (setq encountered (remove c encountered)))))
+
+        (if (= line-cnt 2)
+          (setq badge-prior (+ badge-prior (char-to-priority (first encountered)))))
+
+        (setq line-cnt (mod (1+ line-cnt) 3))
+        (setq inpt (read-line *prog-input* NIL)))
+
+  (print badge-prior))
+
+(if (not (eq *prog-input* *standard-input*))
+  (close *prog-input*))