Problem 12271

12271 - PME-mid2-3

Status | Limits Submit

	Time	Memory
Case 1	1 sec	32 MB
Case 2	1 sec	32 MB
Case 3	1 sec	32 MB
Case 4	1 sec	32 MB
Case 5	1 sec	32 MB

Description

請看試卷

Input

Output

Sample Input Download

0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
21 2 6 7 11 17 19 10 14 0

Sample Output Download

9

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