Question: 
Write a python function to find the index of an extra element present in one sorted array.


Model's Code:
def find_Extra(arr1, arr2, n):
    for i in range(n):
        if arr1[i] != arr2[i]:
            return arr1[i]
    return arr1[n]



Sample Correct Code:
def find_Extra(arr1,arr2,n) : 
    for i in range(0, n) : 
        if (arr1[i] != arr2[i]) : 
            return i 
    return n 


Asserts:
assert find_Extra([1,2,3,4],[1,2,3],3) == 3
assert find_Extra([2,4,6,8,10],[2,4,6,8],4) == 4
assert find_Extra([1,3,5,7,9,11],[1,3,5,7,9],5) == 5


Tests:
Test 1 of 3: FAIL: AssertionError()

Test 890 of 974: 684/890 (76.85393258426966%): failed