import sys
from math import sqrt
input = sys.stdin.readline

def main():
    a, b, c, d = map(int,input().split())
    if (a-c)**2 - 8*(b-d) < 0:
        print("No")
    elif (a-c)**2 - 8*(b-d) == 0:
        print("Yes")
    else:
        print((a+c)/2,(b+d)/2)
if __name__ == '__main__':
    main()