# coding: utf-8
# Your code here!
import sys
readline = sys.stdin.readline
read = sys.stdin.read

a,b,c,d = map(int,read().split())


"""
y = x^2 + ax + b
0 = (a+c)x + (b+d)

2x^2 + (a-c)x + (b-d) = 0
"""

D = (a-c)**2 - 8*(b-d) 
if D < 0:
    print("No")
elif D==0:
    print("Yes")
else:
    print((a+c)/2,(b+d)/2)