a, b, c, d = map(int, input().split())
A, B, C = 2, a - c, b - d
D = B ** 2 - 4 * A * C
if D < 0:
    print('No')
elif D == 0:
    print('Yes')
else:
    x1 = (-B + D ** .5) / 4
    x2 = (-B - D ** .5) / 4
    y1 = x1 ** 2 + a * x1 + b
    y2 = x2 ** 2 + a * x2 + b
    m = (y2 - y1) / (x2 - x1)
    print(m, y1 - m * x1)