import sys

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

def f(a, b, c, d):
    p, q = a - c, b - d
    D = p * p - 8 * q
    if D < 0:
        return 'No'
    elif D == 0:
        return 'Yes'
    else:
        return '{} {}'.format((a + c) / 2, (b + d) / 2)

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