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PiJoules/gist:70ec6ecce718d8a9b0e242a88753f68c

Created May 7, 2017 20:41
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gistfile1.txt
https://www.hackerrank.com/contests/code-golf-challenges/challenges/leibniz
0.7266
f=lambda:range(int(input()))
for _ in f():print(sum((-1)**i/(2*i+1) for i in f()))
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