2020: Day 1

Author: Widdin

2020/01/input.txt

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+1337
+1906
+2007
+1939
+818
+1556
+2005
+1722
+1484
+1381
+1682
+1253
+1967
+1718
+2002
+1398
+1439
+1689
+1746
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+1985
+1387
+1509
+1566
+1276
+1625
+1853
+882
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+1731
+1555
+1860
+1675
+1457
+1554
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+1543
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+1858
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+1383
+1816
+1814
+1481
+1649
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+1759
+1949
+1499
+1374
+1613
+1424
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+1933
+1270
+1844
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+1741
+668
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+1599
+1877
+1474
+1918
+476
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+1029
+202
+1589
+1867
+1503
+1582
+1605
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+1340
+1621
+1921
+1256
+1365
+1314
+1748
+1963
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+1848
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+1826
+1716
+1631
+1404
+1936
+1677
+1661
+1986
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+1603
+1932
+1780
+1902
+2009
+1257
+1871
+1362
+1662
+1507
+1255
+1539
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+1513
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+1640
+1502
+1770
+1437
+1333
+1805
+1591
+1644
+1420
+1809
+1587
+1421
+1540
+1942
+470
+1940
+1831
+1247
+1632
+1975
+1774
+1919
+1829
+1944
+1553
+1361
+1483
+1995
+1868
+1601
+1552
+1854
+1490
+1855
+1987
+1538
+1389
+1454
+1427
+1686
+1456
+1974

2020/01/main.py

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+class Day01:
+
+    def __init__(self):
+        self.puzzle_input = self.load_input()
+
+    def part_one(self) -> int:
+        num_set = set()
+        for first in self.puzzle_input:
+            second = 2020 - first
+            if second in num_set:
+                return first * second
+            num_set.add(first)
+
+    def part_two(self) -> int:
+        for first in self.puzzle_input:
+            num_to_find = 2020 - first
+            num_set = set()
+            for second in self.puzzle_input:
+                third = num_to_find - second
+                if third in num_set:
+                    return first * second * third
+                num_set.add(second)
+
+    @staticmethod
+    def load_input() -> list:
+        list_input = []
+        with open("input.txt") as file:
+            for line in file:
+                list_input.append(int(line.rstrip()))
+        return list_input
+
+
+day = Day01()
+print(f'Result part 1: {day.part_one()}')
+print(f'Result part 2: {day.part_two()}')