제출 #140831

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

Case 1: There is one tree.
Case 2: A forest of 3 trees.

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

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

Case 1: There is one tree.
Case 2: There is one tree.
Case 3: There is one tree.

Case 1: There is one tree.
Case 2: There is one tree.
Case 3: No trees.

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

Case 1: There is one tree.
Case 2: A forest of 3 trees.
Case 3: There is one tree.

Case 1: No trees.
Case 2: A forest of 3 trees.
Case 3: There is one tree.