abhm=tuple(map(float, input().split()))
a=abhm[0]
b=abhm[1]
h=abhm[2]
m=abhm[3]

import math as mt

pi=mt.pi
print(pi)

c=pi*(h+m/60)/6
d=pi*m/30

print(mt.sqrt((a*mt.cos(c)-b*mt.cos(d))**2+(a*mt.sin(c)-b*mt.sin(d))**2))
