[okuli]

Ran both your inputs and get exactly the same results, also can't figure out where's the error. Apparently there's some edge case when you should use different strategy than splitting it in 2 equal piles.

[imaginenore]

Finally solved it. Apparently splitting in half isn't always the optimal step, sometimes you have to move a different amount.

Example:

9 3 3

6 3 3 3

3 3 3 3 3

2 2 2 2 2

1 1 1 1 1