Question: 
Write a python function to check whether an array contains only one distinct element or not.


Model's Code:
def unique_Element(arr, n):
    return 'YES' if len(set(arr)) == 1 else 'NO'



Sample Correct Code:
def unique_Element(arr,n):
    s = set(arr)
    if (len(s) == 1):
        return ('YES')
    else:
        return ('NO')


Asserts:
assert unique_Element([1,1,1],3) == 'YES'
assert unique_Element([1,2,1,2],4) == 'NO'
assert unique_Element([1,2,3,4,5],5) == 'NO'


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 760 of 974: 575/760 (75.6578947368421%): success