AoC 2020: day4

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

2020-python/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 list 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 list 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()