eolymp
bolt
Try our new interface for solving problems
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Problems

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Time limit 1 second
Memory limit 128 MiB
Input example #1 
4
3 3 1 1
1 1 3 1
3 3 1 1
1 1 3 3
Output example #1 
22
Source 2021 USACO Январь, Серебро
No Time to Paint
Uddered but not Herd (Gold)