check-if-all-the-integers-in-a-range-are-covered

Check if All the Integers in a Range Are Covered

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You are given a 2D integer array <code>ranges</code> and two integers <code>left</code> and <code>right</code>. Each <code>ranges[i] = [starti, endi]</code> represents an inclusive interval between <code>starti</code> and <code>endi</code>.

Return <code>true</code> if each integer in the inclusive range <code>[left, right]</code> is covered by at least one interval in <code>ranges</code>. Return <code>false</code> otherwise.

An integer <code>x</code> is covered by an interval <code>ranges[i] = [starti, endi]</code> if <code>starti &lt;= x &lt;= endi</code>.

&nbsp;
Example 1:

<pre>
Input: ranges = [[1,2],[3,4],[5,6]], left = 2, right = 5
Output: true
Explanation: Every integer between 2 and 5 is covered:
- 2 is covered by the first range.
- 3 and 4 are covered by the second range.
- 5 is covered by the third range.
</pre>

Example 2:

<pre>
Input: ranges = [[1,10],[10,20]], left = 21, right = 21
Output: false
Explanation: 21 is not covered by any range.
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= ranges.length &lt;= 50</code></li>
	<li><code>1 &lt;= starti &lt;= endi &lt;= 50</code></li>
	<li><code>1 &lt;= left &lt;= right &lt;= 50</code></li>
</ul>

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