# Bitwise AND of Range of Numbers

Given two integers `start`

and `end`

, return the bitwise AND of all numbers in `[start, end]`

, inclusive.

**Constraints**

`0 ≤ start ≤ end < 2**31`

https://binarysearch.com/problems/Bitwise-AND-of-Range-of-Numbers

## Examples

### Example 1

**Input**

- start =
`5`

- end =
`7`

**Output**

- answer =
`4`

**Explanation**

```
0101 = 5
0110 = 6
0111 = 7
----
0100 = 4
```

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