Harmonic series

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

For a given value of $n$ , compute the sum of the harmonic series:

1 + \frac{1}{2} + \frac{1}{3} + \frac{1}{4} + \dots + \frac{1}{n}

Input

One positive integer $n (1 \leq n \leq 1 0^{4})$ .

Print the sum of the harmonic series with $4$ decimal places.

Input #1

Answer #1

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