You are given three positive integers, $a,b,c$, such that $a,b,c\le 1000000$. Determine whether a triangle of non-zero area can be formed with $a$, $b$, and $c$ as side lengths.

Input Specification

The input consists of a single line with integers $a,b,c$ separated by spaces.

Output Specification

Output on a single line, yes if a valid triangle can be formed.
If a valid triangle can not be formed, output no.

Note: an invalid triangle in this case is one that does not satisfy the strict triangle inequality.

Sample Input 1

1 2 3

Sample Output 1

no

Sample Input 2

1 2 2

Sample Output 2

yes