
Asked in Trell
Find the Second Largest Element
Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.
If a second largest element does not exist, return -1.
Example:
Input:
ARR = [2, 4, 5, 6, 8]
Output:
6
Explanation:
In the sequence, 8 is the largest and 6 is the second largest.
Input:
ARR = [5, 5, 5, 5, 5]
Output:
-1
Explanation:
There is no second largest element as all elements are identical.
Constraints:
1 ≤ T ≤ 100
where 'T' is the number of test cases.1 ≤ N ≤ 5000
where 'N' is the number of elements in 'ARR'.-10^9 ≤ ARR[i] ≤ 10^9
for each element in 'ARR'.
Note:
You do not need to print any output. Implement the function to return the desired results.
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