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  1. using C=System.Console;
  2. class S{static void Main(){for(double n=int.Parse(C.ReadLine()),r,t;n-->0;C.WriteLine(r))for(r=0,t=2*int.Parse(C.ReadLine());t>0;t--)r-=(1-t%4)/--t;}}
Success #stdin #stdout 0.04s 24256KB
comments (?)
stdin
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4
1
2
3
100000
stdout
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1
0.666666666666667
0.866666666666667
0.785395663397448
https://ideone.com/tou5M4
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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