<p>Given a positive integer <code>n</code>, find the sum of all integers in the range <code>[1, n]</code> <strong>inclusive</strong> that are divisible by <code>3</code>, <code>5</code>, or <code>7</code>.</p> <p>Return <em>an integer denoting the sum of all numbers in the given range satisfying the constraint.</em></p> <p> </p> <p><strong class="example">Example 1:</strong></p> <pre> <strong>Input:</strong> n = 7 <strong>Output:</strong> 21 <strong>Explanation:</strong> Numbers in the range <code>[1, 7]</code> that are divisible by <code>3</code>, <code>5,</code> or <code>7 </code>are <code>3, 5, 6, 7</code>. The sum of these numbers is <code>21</code>. </pre> <p><strong class="example">Example 2:</strong></p> <pre> <strong>Input:</strong> n = 10 <strong>Output:</strong> 40 <strong>Explanation:</strong> Numbers in the range <code>[1, 10] that are</code> divisible by <code>3</code>, <code>5,</code> or <code>7</code> are <code>3, 5, 6, 7, 9, 10</code>. The sum of these numbers is 40. </pre> <p><strong class="example">Example 3:</strong></p> <pre> <strong>Input:</strong> n = 9 <strong>Output:</strong> 30 <strong>Explanation:</strong> Numbers in the range <code>[1, 9]</code> that are divisible by <code>3</code>, <code>5</code>, or <code>7</code> are <code>3, 5, 6, 7, 9</code>. The sum of these numbers is <code>30</code>. </pre> <p> </p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= n <= 10<sup>3</sup></code></li> </ul>