0
1
mirror of https://git.sb/baoshuo/OI-codes.git synced 2024-12-02 19:36:30 +00:00
OI-codes/LibreOJ/2431/data/hot2a.in

21 lines
92 B (Stored with Git LFS)
Plaintext

20
1 2
2 3
1 4
3 5
2 6
4 7
6 8
4 9
7 10
10 11
9 12
3 13
9 14
5 15
2 16
6 17
5 18
11 19
4 20