Exercise: Triangle |2|
~~~~~~~~~~~~~~~~~~~~~~

Write a program that takes 3 integers in consecutive 3 lines and
determines whether these integers can be the lengths of the edges of a
triangle or not. Your program should print “YES” if a triangle can be
constructed with given edges and “NO” otherwise.

.. container:: sampleio

   Sample I/O:

.. |2| image:: ../../figures/difficulty_three.png
   :class: difficulty

.. code:: default

   Input:
   3
   5
   4

   Output:
   YES


   Input:
   2
   1
   1

   Output:
   NO