#!/usr/bin/env python3

# Advent Of Code 2020 - Day 1

filename = "input.txt"

with open(filename) as f:
    content = f.readlines()
content = [x.strip() for x in content] 

for i in content:
    for j in content:
        if ( int(i)+int(j) == 2020 ):
            print (int(i)*int(j))