day4-working.py

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

# Initialize the counter for fully contained 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 one range fully contains the other
  if a[0] <= b[0] and b[1] <= a[1]:
    counter += 1
  elif b[0] <= a[0] and a[1] <= b[1]:
    counter += 1

# Print the result
print(counter)