input:

10000
15 14
13 12
5 4
9 8
11 12
15 14
10 9
14 13
2 3
2 1
6 5
10 11
3 4
7 6
8 7
6 5
2 1
2 4
4 6
2 3
3 5
10 9
8 3
9 4
5 6
5 10
3 2
5 4
2 7
1 2
4 3
2 1
2 1
2 1
2 1
9 8
9 8
5 4
1 2
6 5
3 4
3 2
7 8
7 6
2 1
1 2
14 13
3 10
5 6
2 9
11 4
2 3
2 1
8 7
13 6
5 4
5 12
6 7
4 3
7 14
16 15
2 3
2 1
6 10
6 9
6 4
9 11
...

output:

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

result:

wrong answer Condition failed: "getMaxBfsDist(n, subset) <= csqrtn" (test case 16)