19 lines
446 B
Python
19 lines
446 B
Python
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#/usr/bin/env python
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import re
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RE_MATCH = re.compile(r"^(\d+)\-(\d+),(\d+)\-(\d+)$")
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total = 0
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with open("input.txt", "r") as f:
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for line in f:
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line = line.strip()
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m = RE_MATCH.match(line)
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l1 = set(list(range(int(m.group(1)),int(m.group(2))+1)))
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l2 = set(list(range(int(m.group(3)),int(m.group(4))+1)))
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l = l2.intersection(l1)
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if len(l):
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total += 1
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print(total)
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