PROGRAMMING:JMU Python - judging whether a triangle is formed

Input the three sides of the triangle to judge whether it can form a triangle. If it can form output yes, otherwise it will output No.
###Input format:
Input three integers directly in one line, with a space interval between the three integers, without any additional characters.
###Output format:
Output yes or no directly without any additional characters.
###Input sample 1:
```in
3 4 5
```
###Output sample 1:
```out
yes
```
###Input sample 2:
```in
1 2 3
```
###Output sample 2:
```out
no
```






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