AoC20/d01.py

#!/usr/bin/env python3

# ./d01.py d01_bigboy.txt 99920044
# 1939883877222459
# 32625808479480099854130

from sys import argv

t = 2020
if len(argv) > 2:
    t = int(argv[2])

i = set(int(x) for x in open(argv[1]))

def f(x):
    for y in i:
        if x-y in i:
            return y*(x-y)
    return None
print(f(t))

for x in i:
    y = f(t-x)
    if y:
        print(x*y)
        break