Noodle Restauarant
Description
There is a new noodle restaurant in town, in the shape of a square. There are $n$ tables on each side of the restaurant, totaling $n^2$ tables. For the annual inspection, the inspector wants to know what the product of the annual revenue is of all the tables on the 4 corners.
The first input line will contain a single integer $n$ ($2 \leq n \leq 50$), representing the number of tables on each side of the restaurant. The following $n$ lines will each contain $n$ space-separated positive integers, representing the annual revenue of each table in the restaurant. All annual revenues will be between 1 dollar and 1000 dollars.
Output the product of the annual revenue of all the tables on the 4 corners in dollars.
Input
The first input line will contain a single integer $n$ ($2 \leq n \leq 50$), representing the number of tables on each side of the restaurant. The following $n$ lines will each contain $n$ space-separated positive integers, representing the annual revenue of each table in the restaurant. All annual revenues will be between 1 dollar and 1000 dollars.
Output
Output the product of the annual revenue of all the tables on the 4 corners in dollars.
2
7 3
5 1
3
1 3 4
3 1 4
5 7 2
105
40