19 lines
281 B
Python
19 lines
281 B
Python
import math
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highest_num = [0]*31
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a = [int(_) for _ in input().split()]
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for i in a:
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for k in range(32, 0, -1):
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if (i % 2**k == 0):
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highest_num[k] += 1
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res = 0
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for i in highest_num:
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if (i <= 1):
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continue
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res += math.comb(i, 2)
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print(res)
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