Friday, August 9, 2013

 

 UCV2013I

CODE

import math
while(True):
    s=raw_input()
    str=s.split(' ')
    r=int(str[0])
    n=int(str[1])
    if(n==0 & r==0):
        break;
    else:
        x=math.pi/2
        R=r/math.sin(x/n)
        print ("%.2f")%R

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