import math

def a():  # задача А

   x = float(input('x = '))

   y = float(input('y = '))

   if x <= 2 and y <= x and 4 <= (x * x + y * y):

       print('Yes!')

   else:

       print('No!')

a()

def b():  # задача Б

   x = float(input('x = '))

   y = float(input('y = '))

   if (x >= 0) and (x <= math.pi) and (y <= math.sin(x)) and (y <= 0.5):

       print('Yes!')

   else:

       print('No!')

b()

def c(): # задача В

   x = float(input('x = '))

   y = float(input('y = '))

   if (y <= (2 - x * x)) and ((y >= x) or (x >= 0)):

       print('Yes!')

   else:

       print('No!')

c()