<p>There are two mice and <code>n</code> different types of cheese, each type of cheese should be eaten by exactly one mouse.</p> <p>A point of the cheese with index <code>i</code> (<strong>0-indexed</strong>) is:</p> <ul> <li><code>reward1[i]</code> if the first mouse eats it.</li> <li><code>reward2[i]</code> if the second mouse eats it.</li> </ul> <p>You are given a positive integer array <code>reward1</code>, a positive integer array <code>reward2</code>, and a non-negative integer <code>k</code>.</p> <p>Return <em><strong>the maximum</strong> points the mice can achieve if the first mouse eats exactly </em><code>k</code><em> types of cheese.</em></p> <p> </p> <p><strong class="example">Example 1:</strong></p> <pre> <strong>Input:</strong> reward1 = [1,1,3,4], reward2 = [4,4,1,1], k = 2 <strong>Output:</strong> 15 <strong>Explanation:</strong> In this example, the first mouse eats the 2<sup>nd</sup> (0-indexed) and the 3<sup>rd</sup> types of cheese, and the second mouse eats the 0<sup>th</sup> and the 1<sup>st</sup> types of cheese. The total points are 4 + 4 + 3 + 4 = 15. It can be proven that 15 is the maximum total points that the mice can achieve. </pre> <p><strong class="example">Example 2:</strong></p> <pre> <strong>Input:</strong> reward1 = [1,1], reward2 = [1,1], k = 2 <strong>Output:</strong> 2 <strong>Explanation:</strong> In this example, the first mouse eats the 0<sup>th</sup> (0-indexed) and 1<sup>st</sup> types of cheese, and the second mouse does not eat any cheese. The total points are 1 + 1 = 2. It can be proven that 2 is the maximum total points that the mice can achieve. </pre> <p> </p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= n == reward1.length == reward2.length <= 10<sup>5</sup></code></li> <li><code>1 <= reward1[i], reward2[i] <= 1000</code></li> <li><code>0 <= k <= n</code></li> </ul>