4844: P3021 [USACO11MAR] Bovine Bridge Battle S
Memory Limit：128 MB
Time Limit：1.000 S
Judge Style：Text Compare
Creator：
Submit：0
Solved：0
Description
Input
Output
Sample Input Copy
8
-3 0
-2 0
-1 1
0 3
2 0
-3 1
3 0
-2 2 Sample Output Copy
3