leetcode/0789_kth-largest-element-in-a-stream/README.md

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Design a class to find the `kth` largest element in a stream. Note that it is the `kth` largest element in the sorted order, not the `kth` distinct element.
Implement `KthLargest` class:
* `KthLargest(int k, int[] nums)` Initializes the object with the integer `k` and the stream of integers `nums`.
* `int add(int val)` Appends the integer `val` to the stream and returns the element representing the `kth` largest element in the stream.
**Example 1:**
Input
["KthLargest", "add", "add", "add", "add", "add"]
[[3, [4, 5, 8, 2]], [3], [5], [10], [9], [4]]
Output
[null, 4, 5, 5, 8, 8]
Explanation
KthLargest kthLargest = new KthLargest(3, [4, 5, 8, 2]);
kthLargest.add(3); // return 4
kthLargest.add(5); // return 5
kthLargest.add(10); // return 5
kthLargest.add(9); // return 8
kthLargest.add(4); // return 8
**Constraints:**
* `1 <= k <= 104`
* `0 <= nums.length <= 104`
* `-104 <= nums[i] <= 104`
* `-104 <= val <= 104`
* At most `104` calls will be made to `add`.
* It is guaranteed that there will be at least `k` elements in the array when you search for the `kth` element.