text: import sys
  
  with open(sys.argv[1]) as f:
  	lines = f.readlines()
  
  expense_report = [int(n) for n in lines]
  
  for a in expense_report:
  	if a > 2020: continue
  	for b in expense_report:
  		if a + b == 2020:
  			print(a * b)
  			exit(0)
  