Problem:
Score : 300 points

Problem Statement

Does \sqrt{a} + \sqrt{b} < \sqrt{c} hold?

Constraints

1 \leq a, b, c \leq 10^9

All values in input are integers.

Input

Input is given from Standard Input in the following format:

a \ b \ c

Output

If \sqrt{a} + \sqrt{b} < \sqrt{c}, print Yes; otherwise, print No.

Sample Input 1

2 3 9

Sample Output 1

No

\sqrt{2} + \sqrt{3} < \sqrt{9} does not hold.

Sample Input 2

2 3 10

Sample Output 2

Yes

\sqrt{2} + \sqrt{3} < \sqrt{10} holds.

Solution in Common Lisp (SBCL 2.0.3) (judge verdict: Accepted)

(let ((a (read))
      (b (read))
      (c (read)))
  (if (and (< 0 (- c a b))
           (< (* 4 a b) (expt (- c a b) 2)))              
      (format t "Yes~%")
      (format t "No~%")))