import math
x=[]
y=[]
e=float(input())
a=float(input())
v=0
for i in range(0,4):
    x.append(a+v)
    y.append(math.sin(a+v))
    v+=0.1
print(x,y)
q=abs((x[1]-e)/(x[1] - x[0]))
print(q)
print(math.sin(e))
w=abs(((y[3]-y[2])-(y[2]-y[1])))
c= (y[1]-y[0])-(y[2]-y[1])
Rx=((w-c)/6)* q*(q-1)
print(Rx)