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-rw-r--r--AoC2022/aocclj/src/aocclj/day04.clj23
-rw-r--r--AoC2022/aocclj/test/aocclj/core_test.clj7
2 files changed, 30 insertions, 0 deletions
diff --git a/AoC2022/aocclj/src/aocclj/day04.clj b/AoC2022/aocclj/src/aocclj/day04.clj
new file mode 100644
index 0000000..5b03eeb
--- /dev/null
+++ b/AoC2022/aocclj/src/aocclj/day04.clj
@@ -0,0 +1,23 @@
+(ns aocclj.day04
+ (:require [clojure.string :as str]))
+
+(defn subinterval [a0 a1 b0 b1]
+ (and (<= a0 b0) (>= a1 b1)))
+
+(defn subcontained [a0 a1 b0 b1]
+ (or (subinterval a0 a1 b0 b1)
+ (subinterval b0 b1 a0 a1)))
+
+(defn overlap [a0 a1 b0 b1]
+ "Test if [b0;b1] overlaps [a0;a1]"
+ (and (<= a0 b1) (<= b0 a1)))
+
+(defn solver [func input]
+ (transduce
+ (comp
+ (map #(str/split % #"[,-]"))
+ (map (partial map parse-long))
+ (map #(apply func %))
+ (map #(if (true? %) 1 0)))
+ +
+ input))
diff --git a/AoC2022/aocclj/test/aocclj/core_test.clj b/AoC2022/aocclj/test/aocclj/core_test.clj
index dc3f3bb..fd34fe0 100644
--- a/AoC2022/aocclj/test/aocclj/core_test.clj
+++ b/AoC2022/aocclj/test/aocclj/core_test.clj
@@ -2,6 +2,7 @@
(:require [clojure.test :refer :all]
[aocclj.day01 :as day01]
[aocclj.day03 :as day03]
+ [aocclj.day04 :as day04]
[aocclj.core :refer :all]
[clojure.string :as str]))
@@ -16,3 +17,9 @@
(are [expected function] (= expected (function input))
8072 day03/part1
2567 day03/part2)))
+
+(deftest day04
+ (let [input (str/split-lines (slurp "../04/input"))]
+ (are [expected function] (= expected (day04/solver function input))
+ 515 day04/subcontained
+ 883 day04/overlap)))