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IKKO-Ohta/ABC03[C].py

Last active July 1, 2017 01:52
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ABC03[C].py
nums = [int(x) for x in input().split()] ; N = nums[0] ; K = nums[1]
rate = [int(x) for x in input().split()]
rate = sorted(rate)
takahashi = 0
for i in range(N-K,N):
takahashi = (takahashi + rate[i]) / 2
print(takahashi)
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