Find the sum

Easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

For the given value of $n$ , compute the sum

S = \frac{1}{1 \cdot 2} + \frac{1}{2 \cdot 3} + \dots + \frac{1}{n \cdot ( n + 1 )}

Input

One positive integer $n (n \leq 1000)$ .

Print the sum with $6$ decimal places.

Input #1

Answer #1

Input #2

Answer #2

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