961. N-Repeated Element in Size 2N Array

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

# @lc code=start
using LeetCode

function repeated_n_times(A::Vector{Int})
    for i in 2:length(A)
        if A[i] == A[i - 1]
            return A[i]
        end
    end

    # 3X3X OR 3XX3 OR X3X3
    return (A[1] == A[3] || A[1] == A[4]) ? A[1] : A[2]
end
# @lc code=end

repeated_n_times (generic function with 1 method)

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