linked-list-components

Linked List Components

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numComponents

You are given the <code>head</code> of a linked list containing unique integer values and an integer array <code>nums</code> that is a subset of the linked list values.

Return the number of connected components in <code>nums</code> where two values are connected if they appear consecutively in the linked list.

&nbsp;
Example 1:
<img alt="" src="https://assets.leetcode.com/uploads/2021/07/22/lc-linkedlistcom1.jpg" style="width: 424px; height: 65px;" />
<pre>
Input: head = [0,1,2,3], nums = [0,1,3]
Output: 2
Explanation: 0 and 1 are connected, so [0, 1] and [3] are the two connected components.
</pre>

Example 2:
<img alt="" src="https://assets.leetcode.com/uploads/2021/07/22/lc-linkedlistcom2.jpg" style="width: 544px; height: 65px;" />
<pre>
Input: head = [0,1,2,3,4], nums = [0,3,1,4]
Output: 2
Explanation: 0 and 1 are connected, 3 and 4 are connected, so [0, 1] and [3, 4] are the two connected components.
</pre>

&nbsp;
Constraints:

<ul>
	<li>The number of nodes in the linked list is <code>n</code>.</li>
	<li><code>1 &lt;= n &lt;= 104</code></li>
	<li><code>0 &lt;= Node.val &lt; n</code></li>
	<li>All the values <code>Node.val</code> are unique.</li>
	<li><code>1 &lt;= nums.length &lt;= n</code></li>
	<li><code>0 &lt;= nums[i] &lt; n</code></li>
	<li>All the values of <code>nums</code> are unique.</li>
</ul>

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