import 2021

Magiczne · Nov 11, 2024 · 4570d1d · 4570d1d
1 parent 5ef2a45
commit 4570d1d
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diff --git a/2021/01/01.exs b/2021/01/01.exs
@@ -0,0 +1,20 @@
+lines = File.stream!("input.txt")
+  |> Stream.map(&String.trim/1)
+  |> Stream.map(&String.to_integer/1)
+  |> Enum.to_list
+
+# Part 1
+count = lines
+  |> Enum.chunk_every(2, 1, :discard)
+  |> Enum.count(fn [a, b] -> a < b end)
+
+IO.puts("Part 1: #{count}")
+
+# Part 2
+count = lines
+  |> Enum.chunk_every(3, 1, :discard)
+  |> Enum.map(&Enum.sum/1)
+  |> Enum.chunk_every(2, 1, :discard)
+  |> Enum.count(fn [a, b] -> a < b end)
+
+IO.puts("Part 2: #{count}")