PROGRAMMING:Triangle determination

Given three positive integers, which represent the length of three line segments respectively, we can judge whether the three line segments can form a triangle.
###Input format:
A line contains three positive integers, which respectively represent the length of three line segments. The number is separated by a space.
###Output format:
If the triangle can be formed, then output "yes", otherwise output "no".
###Input example:
Example 1
```in
3 4 5
```
Example 2
```in
3 3 6
```
###Output example:
Example 1
```out
yes
```
Example 2
```out
no
```






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