Kaushal is working in Triangle Land and his job is to find out if a triangle can be constructed using 3 different sticks. The complete length of each stick should be used as an edge of a triangle. Sticks cannot be broken.

Help Kaushal in determining whether the triangle can be constructed or not.

INPUT:

• Three integers a, b, c (1 <= a, b, c <= 10⁷)  representing the length of the three sticks

OUTPUT:

• Output in a single line "yes" if a triangle can be constucted or "no" otherwise.