check-good-integer

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Algorithms

You are given a positive integer <code>n</code>.

Let <code>digitSum</code> be the sum of the digits of <code>n</code>, and let <code>squareSum</code> be the sum of the squares of the digits of <code>n</code>.

An integer is called good if <code>squareSum - digitSum &gt;= 50</code>.

Return <code>true</code> if <code>n</code> is good. Otherwise, return <code>false</code>.

&nbsp;
Example 1:

<div class="example-block">
Input: n = 1000

Output: false

Explanation:

<ul>
	<li>The digits of 1000 are 1, 0, 0, and 0.</li>
	<li>The <code>digitSum</code> is <code>1 + 0 + 0 + 0 = 1</code>.</li>
	<li>The <code>squareSum</code> is <code>12 + 02 + 02 + 02 = 1</code>.</li>
	<li>The <code>squareSum - digitSum</code> is <code>1 - 1 = 0</code>. As 0 is not greater than or equal to 50, the output is <code>false</code>.</li>
</ul>
</div>

Example 2:

<div class="example-block">
Input: n = 19

Output: true

Explanation:

<ul>
	<li>The digits of 19 are 1 and 9.</li>
	<li>The <code>digitSum</code> is <code>1 + 9 = 10</code>.</li>
	<li>The <code>squareSum</code> is <code>12 + 92 = 1 + 81 = 82</code>.</li>
	<li>The <code>squareSum - digitSum</code> is <code>82 - 10 = 72</code>. As 72 is greater than or equal to 50, the output is <code>true</code>.</li>
</ul>
</div>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= n &lt;= 109</code></li>
</ul>