K-th Harmonic Number Calculation

Given a positive integer k, calculate the k-th harmonic number defined by the formula:

\(H_k = \sum_{i=1}^{k} \frac{1}{i}\)

The result should be rounded to 4 decimal places.

Note: The input will be provided via standard input, and the output should be printed to standard output. Ensure that your solution handles large inputs efficiently.

inputFormat

The input consists of a single line containing an integer k (1 ≤ k ≤ 10⁷ or as specified by the problem constraints) representing the position of the harmonic number to compute.

outputFormat

Output the k-th harmonic number rounded to 4 decimal places.

## sample

1

1.0000

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