import math
from math import sin, cos, radians

#theta = input() 
#theta = radians(theta)


x = input()
y = input()

z = complex(x,y)

i = 0

print i, z.real, z.imag

k = input()
l = input()

theta = 2.0*math.pi*l/k

for i in range(1,k+1):
    z1 = (cos(theta)*z-sin(theta))/(sin(theta)*z+cos(theta))
    print i, z1.real, z1.imag
    z =z1