Submit solution

Points:
10

Time limit:
2.5s

Memory limit:
64M

Author:

Problem type

Allowed languages

C, C++, Clang, Clang++, Fortran

Given 32-bit unsigned integers, duplicate each bit in-place in the integer.

For example:

- \(10001_2\) becomes \(1100000011_2\)
- \(11110_2\) becomes \(1111111100_2\)

#### Implementation

One function:

```
unsigned long long duplicatebits(unsigned long long);
```

**Note:** The function parameter is an `unsigned long long`

instead of an `unsigned int`

to remove the step of upcasting.

Your function may be called up to \(10^8\) times.

## Comments