aoc-2020/1.1.py

lines = []

with open("1.input") as f:
    for line in f.readlines():
        lines.append(int(line))

for l1 in lines:
    for l2 in lines:
        for l3 in lines:
            if l1 + l2 + l3 == 2020:
                print(l1 * l2 * l3)