Count Set Bits In First N Natural Numbers

easy
Question Solve Solutions 
1. You are given a number n.
2. You have to print the count of set bits of first n natural numbers.

Input Format

A number n

Output Format

A number

Constraints

1 <= n <= 10^9

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input
17
Output
35
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Is A Power Of 2

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