caterpillar
min-max 3
1 2 8 | 4 - 3 = 1
3 4 5 6 9 | 8 - 5 = 3
7 | 0 - 0 = 0
min-sum 4
1 2 3 4 5 6 8 | 7 - 3 = 4
7 | 0 - 0 = 0
9 | 8 - 8 = 0
