from math import sqrt

def pi (n):
    x = 1
    for i in range(n):
        x = 2 - sqrt(4 - x)
    return 3 * 2 ** n * sqrt(x)

if __name__ == '__main__':
    fmt = lambda xs: '\n'.join([ '%2d: %20.20f %20.20f'%x for x in xs ])
    print(fmt([ (n, pi(n), math.pi - pi(n)) for n in range(30) ]))