Subtask no.	Testdata Range	Constraints	Score
1	0~1	範例測資	0 / 0
2	0, 2~6	$a_i=1$	0 / 7
3	0, 2~11, 47	$a_i\geq a_{i+1}$ 遞減	0 / 14
4	1, 12~16, 47	輸入的圖為一條鏈，$M=N-1,u_i=i.v_i=i+1$	21 / 21
5	0~1, 17~21, 47	$N,M,L \leq 3000$	11 / 11
6	0~1, 17~26, 47	$N,M\leq 3000$	17 / 17
7	0~47	無其他限制	0 / 30

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