problem961

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961. N-Repeated Element in Size 2N Array (Easy)

In a array A of size 2N, there are N+1 unique elements, and exactly one of these elements is repeated N times.

Return the element repeated N times.

 

Example 1:

Input: [1,2,3,3]
Output: 3

Example 2:

Input: [2,1,2,5,3,2]
Output: 2

Example 3:

Input: [5,1,5,2,5,3,5,4]
Output: 5

 

Note:

• 4 <= A.length <= 10000
• 0 <= A[i] < 10000
• A.length is even

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