day4-part2-working.py

import sys

# Check if the filename was provided as an argument
if len(sys.argv) < 2:
  print("Please provide the input filename as an argument.")
  sys.exit(1)

# Get the input filename from the command-line argument
filename = sys.argv[1]

# Open the input file and read the lines
with open(filename) as file:
  lines = file.read().strip().split("\n")

# Initialize the counter for overlapping ranges
counter = 0

# Loop over the lines in the input file
for line in lines:
  # Split the line into two parts by the comma
  parts = line.split(",")

  # Parse the first and second ranges
  a = [int(x) for x in parts[0].split("-")]
  b = [int(x) for x in parts[1].split("-")]

  # Check if the ranges overlap
  if a[0] <= b[1] and b[0] <= a[1]:
    counter += 1

# Print the result
print(counter)