Problem
Given a matrix, find the maximum sum of any 2x2 submatrix.
Input format
Input
input.txt
- First line: R and C (2 ≤ R, C ≤ 100) - Next R lines: C integers
Output format
Output
output.txt
- One integer: the max 2x2 submatrix sum
Example
input
3 3 1 2 3 4 5 6 7 8 9
output
28
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Sample cases (from the problem)
Sample Case 1
Input
3 3 1 2 3 4 5 6 7 8 9
Expected output
28
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