제출 #140288

5 5
1 2
2 4
4 3
4 1
3 2
0 0

Case 1: A forest of 2 trees.

Case 1: There is one tree.

1 0
10 10
2 3
8 10
3 1
4 9
9 10
1 2
7 4
8 4
5 9
6 5
0 0

Case 1: There is one tree.
Case 2: There is one tree.

Case 1: There is one tree.
Case 2: No trees.

9 9
7 6
8 6
1 5
9 5
6 4
4 9
8 1
3 2
2 5
7 2
3 2
4 5
0 0

Case 1: There is one tree.
Case 2: A forest of 5 trees.

Case 1: No trees.
Case 2: A forest of 5 trees.