Question: 
Write a python function to find the cube sum of first n natural numbers.


Model's Code:
def sum_Of_Series(n):
    return (n * (n + 1) // 2) ** 2



Sample Correct Code:
def sum_Of_Series(n): 
    sum = 0
    for i in range(1,n + 1): 
        sum += i * i*i       
    return sum


Asserts:
assert sum_Of_Series(5) == 225
assert sum_Of_Series(2) == 9
assert sum_Of_Series(3) == 36


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

Test 504 of 974: 372/504 (73.80952380952381%): success