14 lines
309 B
Python
14 lines
309 B
Python
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from collections import Counter
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input = [i.rstrip() for i in open("input").readlines()]
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splitted = [i.split(' ') for i in input]
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left = [int(i[0]) for i in splitted]
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right = [int(i[1]) for i in splitted]
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counted = Counter(right)
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score = 0
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for item in left:
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score += item * counted[item]
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print(score)
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