41 lines
990 B
Python
41 lines
990 B
Python
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#!/usr/bin/env python
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# 2024 - Advent Of Code 2 - part 2
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# file = 'input_example.txt'
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file = 'input.txt'
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# pylint: disable=consider-using-with
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input_lines = [line.strip('\n') for line in open(file, encoding="utf-8")]
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def is_safe(levels):
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s_diff = 0 if levels[0] > levels[1] else 1
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for l in range(1, len(levels)):
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diff = levels[l] - levels[l - 1]
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if abs(diff) > 3 or diff == 0:
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return False
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s_diff2 = 0 if levels[l] < levels[l - 1] else 1
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if s_diff ^ s_diff2 != 0:
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# print("sign change")
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return False
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return True
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safe = 0
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for reports in input_lines:
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list_levels = [ int(r) for r in reports.split(' ') ]
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if is_safe(list_levels):
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safe += 1
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else:
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for try_level in range(0, len(list_levels)):
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new_levels = list_levels.copy()
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del new_levels[try_level]
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if is_safe(new_levels):
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safe += 1
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break
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print(f'{safe=}')
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