70.0% (7/10)

52.6% (10/19)

2

12 13
11 1
1 3
1 2
2 3
2 4
4 6
2 6
2 5
5 7
7 2
7 8
8 9
8 10

3 2
1 2
2 0

5
1

# Problem Source

$\LaTeX$ fixed by Seanliu on 20210316