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Problem
Print the border (outer ring) of the matrix in row-major order.
Input format
Input
input.txt
- First line: R and C (2 ≤ R, C ≤ 100) - Next R lines: C integers
Output format
Output
output.txt
- Space-separated integers forming the border
Example
input
3 4 1 2 3 4 5 6 7 8 9 10 11 12
output
1 2 3 4 8 12 11 10 9 5
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Sample cases (from the problem)
Sample Case 1
Input
3 4 1 2 3 4 5 6 7 8 9 10 11 12
Expected output
1 2 3 4 8 12 11 10 9 5
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