Description

Given three positive integers representing the lengths of three line segments, determine if these three segments can form a triangle.

Input Format

A single line containing three positive integers a, b, c ($1≤a,b,c≤100$), representing the lengths of the three line segments, separated by spaces.

Output Format

If the segments can form a triangle, output "yes"; otherwise, output "no".

Sample

3 4 5

yes