def main():
    a, b, c, d = map( int, input().split())
    t = (a-c)**2 -8*(b-d)
    if t < 0:
        print("No")
        return
    elif t == 0:
        print("Yes")
        return
    print((a+c)/2, (b+d)/2)
if __name__ == '__main__':
    main()