4_2.py

   1 """
   2 Calculate the number of assignment pairs, where
   3 one range fully contains the other.
   4 """
   5
   6 overlaps = 0
   7
   8 def compare(elf0, elf1):
   9     return elf1["start"] <= elf0["start"] <= elf1["end"]
  10
  11
  12 with open("4.in") as fh:
  13     for line in fh:
  14         line = line.strip()
  15
  16         elves = []
  17         for elf in line.split(","):
  18             elf_s, elf_e = [int(x) for x in elf.split("-")]
  19             elves.append({
  20                 "start": elf_s,
  21                 "end": elf_e
  22             })
  23
  24         elf0_overlaps = compare(elves[0], elves[1])
  25         elf1_overlaps = compare(elves[1], elves[0])
  26
  27         if elf0_overlaps or elf1_overlaps:
  28             overlaps += 1
  29
  30 print(overlaps)