Buy the water#6277

Buy the water

1 second

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Very easy

The cost of a bottle of water (including the cost of the empty bottle) is $1$ dollar $20$ cents. The cost of the empty bottle is $20$ cents.

How many bottles of water is it possible to drink for $n$ dollars, if you can recycle bottles for cash and buy new bottles of water for this cash.

Input

Positive integer $n$ $(1 \leq n \leq 1000)$ (1 ≤ n ≤ 1000).

Number of bottles of water that you can drink for $n$ dollars.

Example 1

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(1 \leq n \leq 1000)