4833: P2340 [USACO03FALL] Cow Exhibition G

Memory Limit：128 MB Time Limit：1.000 S
Judge Style：Text Compare Creator：
Submit：0 Solved：0

Description

Input

Output

Sample Input Copy 

5
-5 7
8 -6
6 -3
2 1
-8 -5

Sample Output Copy 

8

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