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Problems

Triangle

Triangle

Time limit 1 second
Memory limit 128 MiB

Three positive integers a, b and c are given. Print the sum of the given numbers if there exists a triangle with side lengths a, b, c, and "No" otherwise.

Input data

Three positive integers a, b и c.

Output data

Print the sum of the given numbers if there exists a triangle with side lengths a, b, c, and "No" otherwise.

Examples

Input example #1
3 2 4
Output example #1
9
Input example #2
3 2 7
Output example #2
No
Author Matviychuk Sergiy Volodymyrovych
Source "ABC programming"