34 lines
534 B
Python
34 lines
534 B
Python
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example = """
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3 4
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4 3
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2 5
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1 3
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3 9
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3 3
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"""
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parsed = [[],[]]
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for x in open('input.txt', 'r').readlines():
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# for x in example.splitlines():
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if x:
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a = [y for y in x.split(" ") if y]
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parsed[0].append(a[0])
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parsed[1].append(a[1])
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parsed[0] = sorted(parsed[0])
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parsed[1] = sorted(parsed[1])
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parsed[0] = [int(x) for x in parsed[0]]
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parsed[1] = [int(x) for x in parsed[1]]
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asd = []
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for x in parsed[0]:
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cnt = parsed[1].count(x)
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asd.append(x*cnt)
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num = sum(asd)
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print(num)
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