Problems
Triangle
Triangle
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