27 lines
517 B
Python
27 lines
517 B
Python
#!/usr/bin/env python3
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import sys
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input_file = sys.argv[1]
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with open(input_file) as fd:
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lines = [line.rstrip() for line in fd.readlines()]
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safe_num = 0
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for line in lines:
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report = [int(level) for level in line.split(" ")]
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acc = sorted(report)
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dec = acc[::-1]
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if report != acc and report != dec:
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continue
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for i in range(len(report)-1):
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diff = abs(report[i] - report[i+1])
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if diff < 1 or diff > 3:
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break
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else:
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safe_num += 1
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print(safe_num)
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