init 2017

2017/src/day01.clj

@@ -0,0 +1,26 @@
+(ns day01
+  (:require input-manager))
+
+(defn to-digit [c] (Character/digit c 10))
+
+(def input (mapv to-digit (input-manager/get-input-raw 2017 01)))
+
+(defn solve [offset]
+  (let [lookup (fn [idx]
+                 (input (mod idx (count input))))]
+      (->> input
+              (map-indexed vector)
+              (filter (fn [[idx el]]
+                        (= el (lookup (+ offset idx)))))
+              (map second)
+              (apply +))))
+
+;; part 1
+(solve 1)
+
+
+
+;; part 2
+(solve (/ (count input) 2))
+
+

2017/src/day02.clj

@@ -0,0 +1,25 @@
+(ns day02
+  (:require input-manager
+            core))
+
+(def input (mapv (comp #(mapv parse-long %)
+                       core/split-whitespace)
+                 (input-manager/get-input 2017 02)))
+
+;; part 1
+(->> input
+     (map (comp #(apply - %)
+                (juxt #(apply max %)
+                      #(apply min %))))
+     (apply +))
+
+(defn find-divisible [l]
+  (or (first
+       (for [a (range (count l))
+             b (range (count l))
+             :when (and (not= a b)
+                        (= (mod (l a) (l b)) 0))]
+         (/ (l a) (l b))))
+      0))
+
+(apply + (map find-divisible input))

2017/src/day04.clj

@@ -0,0 +1,20 @@
+(ns day04
+  (:require input-manager
+            core))
+
+(def input (map core/split-whitespace (input-manager/get-input 2017 04)))
+
+;; part 1
+(->> input
+     (filter #(= (count %)
+                 (count (into #{} %))))
+     count)
+
+;; part 2
+(->> input
+     (filter (fn [l]
+               (= (count (into #{} (map frequencies l)))
+                  (count l))))
+
+     count)
+

2017/src/user.clj

@@ -0,0 +1,11 @@
+(ns user
+  (:require
+    [clojure.pprint :as pprint]))
+
+(defonce printer (bound-fn* pprint/pprint))
+(add-tap printer)
+
+(comment
+  ;; tap debugging
+  (remove-tap printer))
+