PROGRAMMING:Annual growth rate

The annual sales volume of an enterprise has repeatedly reached new highs, and the general manager plans to double the sales volume several years later. Please write a program to help the general manager calculate what kind of annual sales growth rate the enterprise must maintain in order to achieve this goal.
####Input format
>Years (integer)
####Output format
>Annual growth rate (percentage)
####Input sample
```in
five
```
####Output sample
```out
14.87%
```
Requirement: output percentage and keep 2 decimal places.







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