CSES - Counting Bits
  • Time limit: 1.00 s
  • Memory limit: 512 MB
Your task is to count the number of one bits in the binary representations of integers between $1$ and $n$.

Input

The only input line has an integer $n$.

Output

Print the number of one bits in the binary representations of integers between $1$ and $n$.

Constraints
  • $1 \le n \le 10^{15}$
Example

Input:
7

Output:
12

Explanation: The binary representations of $1 \ldots 7$ are 1, 10, 11, 100, 101, 110, and 111, so there are a total of 12 one bits.