4538: P3416 [USACO16DEC] Moocast 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 

4
1 3 5
5 4 3
7 2 1
6 1 1

Sample Output Copy 

3

HINT

Source/Category

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