Table 2.

Numerical experiment of problems in different sizes.

Classification	Example	$\mathit{h}$	$\mathit{m}$	$\mathit{o}$	$\mathit{v}$	$\mathit{i}$	$\mathit{t}$
Small	S1	2	1	1	2	1	1
	S2	3	1	1	3	1	1
	S3	4	1	2	4	1	1
	S4	4	2	2	5	1	2
	S5	5	2	2	6	1	2
Medium	M1	8	3	3	8	2	3
	M2	10	3	3	14	2	4
	M3	12	4	4	18	2	4
	M4	14	4	5	24	2	5
	M5	18	6	5	28	2	6