1 2 1
1 1

-> answer = 1 not 2..
final configuration
1 2 -> minimum 2....
i solved it 4 times thinking i was supose to find the minimal height of the stacks that have things added

and one more thing
test 13
100 100 99*****
1 1 1 1 1..........
..........
...........
1 1 1 1  1.....