do day 6

2025/src/day06.clj

@@ -0,0 +1,46 @@
+(ns day06
+  (:require input-manager))
+
+(def input
+  (input-manager/get-input 2025 6))
+
+(def row-count 4)
+(def nums-raw (take row-count input))
+(def nums (->> nums-raw
+               (map #(map parse-long (re-seq #"\d+" %)))))
+(def op-map {\+ +, \* *})
+(def ops (as-> input v
+           (drop row-count v)
+           (first v)
+           (filter (partial not= \space) v)
+           (mapv op-map v)))
+(def LEN (count (first nums-raw)))
+
+;; part 1
+(->> nums
+     (apply map (fn [op & rst]
+                  (apply op rst))
+            ops)
+     (apply +))
+
+;; part 2
+(loop [col-idx 0
+       op-idx 0
+       curr-nums []
+       acc 0]
+  (if (>= col-idx LEN)
+    (+ acc (apply (get ops op-idx) curr-nums))
+    (let [col (->> nums-raw
+                   (map #(.charAt % col-idx))
+                   (filter (partial not= \space))
+                   (map #(- (int %) (int \0))))
+          op (get ops op-idx)]
+      (if (empty? col)
+        (recur (inc col-idx)
+               (inc op-idx)
+               []
+               (+ acc (apply op curr-nums)))
+        (recur (inc col-idx)
+               op-idx
+               (conj curr-nums (parse-long (apply str col)))
+               acc)))))