OI-codes/LibreOJ/3280/data/01-07.in

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