AoC 2020: day 1

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

.gitignore

@@ -12,8 +12,5 @@
 *.out
 
 #VSCode
+.vscode
 .vscode/*
-!.vscode/settings.json
-!.vscode/tasks.json
-!.vscode/launch.json
-!.vscode/extensions.json

2020/inputs/day_1

@@ -0,0 +1,200 @@
+1837
+1585
+1894
+1715
+1947
+1603
+1746
+1911
+1939
+1791
+1800
+1479
+1138
+1810
+1931
+1833
+1470
+1882
+1725
+1496
+1890
+1862
+1990
+1958
+1997
+1844
+1524
+541
+2001
+1591
+1687
+1941
+1940
+1561
+1813
+1654
+1500
+1575
+1826
+2006
+679
+1660
+1679
+1631
+2008
+575
+1583
+1883
+1904
+1436
+1650
+1532
+1907
+1803
+1693
+1700
+359
+1516
+1625
+1908
+1994
+1910
+1644
+1706
+1781
+1639
+1662
+1712
+1796
+1915
+1550
+1721
+1697
+1917
+1665
+1646
+1968
+1881
+1893
+1468
+1678
+1774
+285
+1754
+1856
+1677
+1823
+1802
+1681
+1587
+1767
+1711
+1900
+1983
+1787
+1996
+1726
+1982
+1971
+1553
+1542
+1863
+2002
+1831
+1891
+1555
+2000
+1847
+1783
+1873
+1761
+1742
+1534
+1993
+1898
+1973
+1974
+1597
+1540
+1581
+1864
+1452
+1637
+1649
+1886
+1965
+1460
+1664
+1701
+1647
+1812
+1937
+1902
+2004
+1991
+1718
+1887
+1606
+1748
+1737
+1608
+1641
+1710
+1724
+705
+1985
+1571
+1805
+131
+1788
+1707
+1513
+1615
+1897
+1476
+1927
+1745
+1926
+1839
+1807
+1955
+1692
+1645
+1699
+1471
+1604
+1830
+1622
+1972
+1866
+1814
+1816
+1855
+1820
+1034
+1673
+1704
+1969
+1580
+1980
+1739
+1896
+434
+497
+1851
+1933
+458
+1521
+1551
+1762
+2010
+1614
+1840
+1747
+1875
+1836
+1895
+1518
+1825
+1987

2020/solutions/day_1.py

@@ -0,0 +1,43 @@
+"""AOC Day 1"""
+
+import pathlib
+import time
+
+def read_input(input_path: str) -> list:
+    """take input file path and return appropriate data structure"""
+    with open(input_path, 'r') as input_file:
+        entries = list()
+        for entry in input_file.readlines():
+            entries.append(int(entry))
+        return entries
+
+def part1(entries: list) -> int:
+    """part1 solver take a set of int and return an int"""
+    for x in entries:
+        complement = 2020 - x
+        if complement in entries:
+            return x * complement
+    return None
+
+def part2(entries: list) -> int:
+    """part2 solver take a set of int and return an int"""
+    for x, i in enumerate(entries):
+        for y in entries[i:]:
+            complement = 2020 - x - y
+            if complement in entries:
+                return x * y * complement
+    return None
+
+
+def main():
+    """main function"""
+    input_path = str(pathlib.Path.cwd()) + "/inputs/" + str(pathlib.Path(__file__).stem)
+    entries = read_input(input_path)
+    start_time = time.time()
+    print("Part 1: %d" % part1(entries))
+    print("Part 2: %d" % part2(entries))
+    end_time = time.time()
+    print("Execution time: %f" % (end_time-start_time))
+
+if __name__ == "__main__":
+    main()