第1行输入N和C，之后N行每行输入一只奶牛的坐标．
BZPRO第1行输入N和C，之后N行每行输入一只奶牛的坐标．
仅一行，先输出牛群数，再输出最大牛群里的牛数，用空格隔开．
4 2
1 1
3 3
2 2
10 10
* Line 1: A single line with a two space-separated integers: the
number of cow neighborhoods and the size of the largest cow
neighborhood.
2 3
OUTPUT DETAILS:
There are 2 neighborhoods, one formed by the first three cows and
the other being the last cow. The largest neighborhood therefore
has size 3.