PROGRAMMING:Find the sum of 1 + 1 / 3 + 1 / 5 + 1 / 7 +... + 1 / n
Find the sum of 1 + 1 / 3 + 1 / 5 + 1 / 7 +... + 1 / n.
This problem requires: any input a positive odd number n, calculate the denominator of odd fraction sum, such as input 5, then calculate 1 + 1 / 3 + 1 / 5, the value range of n is [3,99]. Output the final calculation result with two decimal places.
###Input format:
Enter a positive odd number n.
###Output format:
Output the calculation result in one line, accurate to two decimal places.
###Input example:
```in
five
```
###Output example:
```out
one point five three
```
answer：If there is no answer, please comment
This problem requires: any input a positive odd number n, calculate the denominator of odd fraction sum, such as input 5, then calculate 1 + 1 / 3 + 1 / 5, the value range of n is [3,99]. Output the final calculation result with two decimal places.
###Input format:
Enter a positive odd number n.
###Output format:
Output the calculation result in one line, accurate to two decimal places.
###Input example:
```in
five
```
###Output example:
```out
one point five three
```
answer：If there is no answer, please comment