1 files changed, 34 insertions, 0 deletions
diff --git a/2022/Day03/part-one.cl b/2022/Day03/part-one.cl
new file mode 100644
index 0000000..874f893
--- /dev/null
+++ b/2022/Day03/part-one.cl
@@ -0,0 +1,34 @@
+(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))
+
+(let
+  ((inpt (read-line *prog-input* NIL)) (first-comp "") (second-comp "") (encountered '()) (priority-sum 0))
+
+  (loop until (or (string= inpt "end") (not inpt)) do
+        (setq encountered '())
+        (setq first-comp (subseq inpt 0 (/ (length inpt) 2)))
+        (setq second-comp (subseq inpt (/ (length inpt) 2)))
+
+        (loop for itype-first across first-comp do
+              (loop for itype-second across second-comp do
+                    (if (and (char= itype-first itype-second) (not (member itype-first encountered)))
+                      (progn (push itype-first encountered)
+                             (setq priority-sum (+ priority-sum (char-to-priority itype-first)))))))
+
+        (setq inpt (read-line *prog-input* NIL)))
+
+  ;; (print (loop for itype in encountered sum (char-to-priority itype)))
+  (print priority-sum))
+
+(if (not (eq *prog-input* *standard-input*))
+  (close *prog-input*))
+