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print reduce(lambda s,s2: s+s2**.5, reduce(lambda r,x: [r[0]+x,r[1]+x*x], map(int,raw_input().split()), [0,0]))

Success #stdin #stdout 0.01s 7520KB

stdin

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3 4 12

stdout

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32.0

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Python (cpython 2.7.16)

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public

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