19 lines
387 B
Python
19 lines
387 B
Python
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from collections import defaultdict
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with open('input', 'r') as f:
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adapters = list(map(int, f.readlines()))
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adapters.append(0)
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adapters.sort()
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adapters.append(adapters[-1] + 3)
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print(adapters)
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countMap = defaultdict(int)
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countMap[0] = 1
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for adapter in adapters:
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for target in range(1, 4):
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countMap[adapter + target] += countMap[adapter]
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print(countMap[adapters[-1]])
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