# Problem Definition

## Description

Given a binary array, find the maximum number of consecutive 1s in this array.

**Example 1:**

```plaintext
Input: [1,1,0,1,1,1]
Output: 3
Explanation: The first two digits or the last three digits are consecutive 1s.
    The maximum number of consecutive 1s is 3.
```

**Note:**

* The input array will only contain `0` and `1`.
* The length of input array is a positive integer and will not exceed 10,000.

## Notes