What is the value of this test case?


#1

9
[0,0,0,0,0,0,0,0,0]

No. of ways to arrange this array into 3 subarrays with equal sum?
Can anyone mathematically solve it for me to understand?

The answer is 28. Question is how?


#2

selecting 2 values for i and j. such that i not equal j . So 9C2=28.