a,b,c,d = map(int,input().split()) 
D = (a - c) ** 2 - 8 * (b - d)
import sys
if D == 0:
    print('Yes')
    exit()
if D < 0:
    print('No')
    exit()
p = (a + c) / 2
q = (b + d) / 2
print(p,q)