<p>Given a binary array <code>nums</code> and an integer <code>goal</code>, return <em>the number of non-empty <strong>subarrays</strong> with a sum</em> <code>goal</code>.</p>



<p>A <strong>subarray</strong> is a contiguous part of the array.</p>



<p>&nbsp;</p>

<p><strong>Example 1:</strong></p>



<pre>

<strong>Input:</strong> nums = [1,0,1,0,1], goal = 2

<strong>Output:</strong> 4

<strong>Explanation:</strong> The 4 subarrays are bolded and underlined below:

[<u><strong>1,0,1</strong></u>,0,1]

[<u><strong>1,0,1,0</strong></u>,1]

[1,<u><strong>0,1,0,1</strong></u>]

[1,0,<u><strong>1,0,1</strong></u>]

</pre>



<p><strong>Example 2:</strong></p>



<pre>

<strong>Input:</strong> nums = [0,0,0,0,0], goal = 0

<strong>Output:</strong> 15

</pre>



<p>&nbsp;</p>

<p><strong>Constraints:</strong></p>



<ul>

	<li><code>1 &lt;= nums.length &lt;= 3 * 10<sup>4</sup></code></li>

	<li><code>nums[i]</code> is either <code>0</code> or <code>1</code>.</li>

	<li><code>0 &lt;= goal &lt;= nums.length</code></li>

</ul>