public class Solution
extends Object
961 - N-Repeated Element in Size 2N Array\.
Easy
You are given an integer array `nums` with the following properties:
* `nums.length == 2 * n`.
* `nums` contains `n + 1` **unique** elements.
* Exactly one element of `nums` is repeated `n` times.
Return _the element that is repeated_ `n` _times_.
**Example 1:**
**Input:** nums = [1,2,3,3]
**Output:** 3
**Example 2:**
**Input:** nums = [2,1,2,5,3,2]
**Output:** 2
**Example 3:**
**Input:** nums = [5,1,5,2,5,3,5,4]
**Output:** 5
**Constraints:**
* `2 <= n <= 5000`
* `nums.length == 2 * n`
* 0 <= nums[i] <= 104
* `nums` contains `n + 1` **unique** elements and one of them is repeated exactly `n` times.