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| author | Julien Dessaux | 2023-03-06 23:48:00 +0100 |
|---|---|---|
| committer | Julien Dessaux | 2023-03-06 23:48:00 +0100 |
| commit | d74ab7641eda7a78dbf1f55d438bdb16bb27dd37 (patch) | |
| tree | 443f0b8589096b3ad29af6f470e80388fdf6cf1c | |
| parent | 2022-01 in haskell (diff) | |
| download | advent-of-code-d74ab7641eda7a78dbf1f55d438bdb16bb27dd37.tar.gz advent-of-code-d74ab7641eda7a78dbf1f55d438bdb16bb27dd37.tar.bz2 advent-of-code-d74ab7641eda7a78dbf1f55d438bdb16bb27dd37.zip | |
2020-01 part 1 in haskell
| -rw-r--r-- | 2020/01/example | 6 | ||||
| -rw-r--r-- | 2020/01/first.hs | 29 | ||||
| -rw-r--r-- | 2020/01/input | 200 |
3 files changed, 235 insertions, 0 deletions
diff --git a/2020/01/example b/2020/01/example new file mode 100644 index 0000000..e3fb011 --- /dev/null +++ b/2020/01/example @@ -0,0 +1,6 @@ +1721 +979 +366 +299 +675 +1456 diff --git a/2020/01/first.hs b/2020/01/first.hs new file mode 100644 index 0000000..5a615a9 --- /dev/null +++ b/2020/01/first.hs @@ -0,0 +1,29 @@ +module Main where + +import Control.Monad (when) +import Data.Maybe (catMaybes, fromJust) +import System.Exit (die) + +exampleExpectedOutput = 514579 + +compute2020 :: Int -> Int -> Maybe Int +compute2020 a b + | a + b == 2020 = Just (a * b) + | otherwise = Nothing + +compute :: String -> Int +compute input = head . catMaybes $ processInput inputList + where + inputList :: [Int] + inputList = map read $ lines input + processInput :: [Int] -> [Maybe Int] + processInput (_:[]) = [Nothing] + processInput (x:xs) = map (compute2020 x) xs ++ processInput xs + +main :: IO () +main = do + example <- readFile "example" + let exampleOutput = compute example + when (exampleOutput /= exampleExpectedOutput) (die $ "example failed: got " ++ show exampleOutput ++ " instead of " ++ show exampleExpectedOutput) + input <- readFile "input" + print $ compute input diff --git a/2020/01/input b/2020/01/input new file mode 100644 index 0000000..8f18073 --- /dev/null +++ b/2020/01/input @@ -0,0 +1,200 @@ +1962 +1577 +1750 +1836 +1762 +1691 +1726 +1588 +1370 +1043 +1307 +1552 +1813 +1804 +1765 +1893 +1610 +764 +1512 +1404 +1711 +1000 +1694 +1546 +1880 +1721 +2006 +1787 +1510 +1850 +1420 +1712 +1926 +1707 +1983 +1680 +1436 +389 +1448 +1875 +1333 +1733 +1935 +1794 +1337 +1863 +1769 +1635 +1499 +1807 +1326 +1989 +1705 +1673 +1829 +1684 +1716 +456 +1696 +1398 +1942 +1851 +1690 +1328 +1356 +1775 +1564 +1466 +1273 +1896 +766 +1814 +1810 +1537 +1463 +1755 +1341 +1665 +1520 +1366 +1387 +1976 +1717 +1737 +1551 +1760 +1496 +1664 +1450 +1319 +1674 +1630 +1301 +1330 +1658 +1637 +1655 +1439 +1832 +1948 +1339 +1656 +1449 +1296 +1489 +1758 +1939 +1857 +1402 +1394 +1882 +1446 +1412 +1430 +1212 +1377 +1501 +1873 +1812 +1667 +1560 +1654 +1575 +1999 +1581 +1792 +1299 +1843 +1383 +1351 +1297 +1822 +1801 +1977 +1316 +1477 +1980 +1693 +1220 +1554 +1607 +1903 +1669 +1593 +1955 +1286 +1909 +1280 +1854 +2005 +1820 +1803 +1763 +1660 +1410 +1974 +1808 +1816 +1723 +1936 +1423 +1818 +1800 +1294 +857 +496 +1248 +1670 +1993 +1929 +1966 +1381 +1259 +1285 +1797 +1644 +1919 +1267 +1509 +399 +1300 +1662 +1556 +1747 +1517 +1972 +1729 +1506 +1544 +1957 +1930 +1956 +1753 +1284 +1389 +1689 +1709 +1627 +1770 +847 |