Mr. West bought a new car! So he is travelling around the city.
  One day he comes to a vertical corner. The street he is currently in has a width x, the street he wants to turn to has a width y. The car has a length l and a width d.
  Can Mr. West go across the corner? 

Input 

  Every line has four real numbers, x, y, l and w.
  Proceed to the end of file. 

Output 

  If he can go across the corner, print "yes". Print "no" otherwise. 

Sample Input 

10 6 13.5 4
10 6 14.5 4 

Sample Output 

yes
no 

• Re:第一题 (579) hans1987 2008-09-20 11:47:56