lib/benchmark.ex

@@ -1,8 +0,0 @@
-defmodule Benchmark do
-  def measure(function) do
-    function
-    |> :timer.tc()
-    |> elem(0)
-    |> Kernel./(1_000_000)
-  end
-end

lib/day1/day1.ex

@@ -1,73 +0,0 @@
-defmodule Day1 do
-  @example_1 """
-  1721
-  979
-  366
-  299
-  675
-  1456
-  """
-
-  def part1(example \\ false) do
-    if(example, do: @example_1, else: File.read!("lib/day1/input.txt"))
-    |> String.trim()
-    |> String.split("\n")
-    |> Enum.map(&String.to_integer/1)
-    |> all_pairs()
-    |> find_sum_to_2020()
-  end
-
-  def part2(example \\ false) do
-    if(example, do: @example_1, else: File.read!("lib/day1/input.txt"))
-    |> String.trim()
-    |> String.split("\n")
-    |> Enum.map(&String.to_integer/1)
-    |> all_triples()
-    |> find_sum_to_2020()
-  end
-
-  def all_pairs(items) do
-    items
-    |> Enum.drop(-1)
-    |> Enum.with_index()
-    |> Enum.flat_map(fn {a, a_index} ->
-      {_, rest} = Enum.split(items, a_index + 1)
-
-      Enum.map(rest, fn b ->
-        {a, b}
-      end)
-    end)
-  end
-
-  def all_triples(items) do
-    items
-    |> Enum.drop(-1)
-    |> Enum.with_index()
-    |> Enum.flat_map(fn {a, a_index} ->
-      {_, rest} = Enum.split(items, a_index + 1)
-
-      rest
-      |> Enum.drop(-1)
-      |> Enum.with_index()
-      |> Enum.flat_map(fn {b, b_index} ->
-        {_, rest_rest} = Enum.split(rest, b_index + 1)
-
-        Enum.map(rest_rest, fn c ->
-          {a, b, c}
-        end)
-      end)
-    end)
-  end
-
-  def find_sum_to_2020(groups) do
-    Enum.find_value(groups, fn items ->
-      list = Tuple.to_list(items)
-
-      if Enum.reduce(list, 0, &(&1 + &2)) == 2020 do
-        Enum.reduce(list, 1, &(&1 * &2))
-      else
-        nil
-      end
-    end)
-  end
-end

lib/day1/input.txt

@@ -1,200 +0,0 @@
-1695
-1157
-1484
-1717
-622
-1513
-1924
-63
-1461
-1971
-1382
-1587
-1913
-1665
-1464
-1914
-1637
-1527
-1424
-1361
-1187
-272
-1909
-1448
-1623
-1164
-1931
-1646
-1096
-1655
-1962
-1961
-1694
-1792
-1989
-1616
-138
-1887
-1357
-1965
-1085
-308
-2007
-1254
-1179
-1124
-1719
-1467
-1928
-1630
-1676
-1359
-1241
-1511
-1413
-1656
-1818
-1919
-1422
-1745
-1208
-1609
-1544
-1775
-1154
-1057
-1440
-1242
-1202
-1266
-1305
-1836
-1760
-1730
-1396
-1315
-1496
-1964
-1300
-1195
-1583
-1607
-1743
-1682
-1453
-1848
-1320
-1601
-954
-1473
-1847
-1486
-1853
-1668
-1342
-1087
-1139
-1349
-1568
-1728
-1420
-1233
-1073
-1376
-1658
-1477
-1871
-1958
-1950
-1503
-1758
-1474
-1203
-1336
-1981
-1309
-1618
-1846
-1974
-1940
-1333
-1119
-1756
-1918
-961
-1307
-1375
-1346
-1611
-1284
-84
-1754
-1608
-2010
-1341
-1136
-1218
-1882
-1911
-1288
-1930
-1749
-1952
-1556
-1757
-1761
-1112
-1963
-1186
-1373
-1622
-1973
-1330
-1508
-1222
-1226
-1389
-1679
-1584
-1237
-1563
-1763
-1998
-1293
-1642
-95
-1661
-1674
-1100
-1262
-1895
-1548
-1400
-1205
-1435
-1156
-1034
-1577
-1701
-1198
-1173
-1500
-1858
-1809
-1780
-1412
-1982
-1070
-1523
-1776
-1598
-1113
-1144
-1777
-1313
-1102
-1999
-1405
-1784
-1196