mod = 1000000007
eps = 10**-9


def main():
    import sys
    from math import sqrt
    input = sys.stdin.readline

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

    D = (a-c) ** 2 - 4 * 2 * (b-d)
    if D < 0:
        print("No")
    elif D == 0:
        print("Yes")
    else:
        print((a+c) / 2, (b+d) / 2)


if __name__ == '__main__':
    main()