import numpy as np


def main():
    
    n=input("Numero di iterazioni:\n")
    n=int(n)

   
    l0_buono=np.sqrt(np.float128(2.0))
   

    for i in range(n):
        l1_buono=np.sqrt((l0_buono/2.0)**2+(1.0-np.sqrt(1.0-(l0_buono/2.0)**2))**2)
        l0_buono=l1_buono
        pi_buono=l1_buono*4*2.0**(i)


        print(str(i)+ "  "+str(pi_buono))

if __name__ == "__main__":
    main()