#!/usr/bin/env python
# 2022 - Advent Of Code 4

# file = 'input_example.txt'
file = 'input.txt'

overlap = 0
with open(file, encoding="utf-8") as f:
    ranges_list = [line.strip().split(',') for line in f.readlines()]
    for ranges in ranges_list:
        elf1_r = ranges[0].split('-')
        elf2_r = ranges[1].split('-')
        if int(elf1_r[0]) <= int(elf2_r[0]) and int(elf1_r[1]) >= int(elf2_r[1]):
            print(f"1range {elf2_r} is contained in {elf1_r}")
            overlap += 1
        elif int(elf2_r[0]) <= int(elf1_r[0]) and int(elf2_r[1]) >= int(elf1_r[1]):
            print(f"2range {elf1_r} is contained in {elf2_r}")
            overlap += 1

print(overlap)