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
💬 Discussion
Loading...💬
No comments yet. Be the first to start the discussion!
💻 No output yet.
Click Run in the editor to execute your code with the custom input.
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
Solve it your way first
Community solutions unlock after you submit a passing solution. Don't peek.
Ready to solve this challenge?
Create a free account to write code, submit solutions, and track your progress.
⌨️ Keyboard Shortcuts
Code Editor
Run Code
Ctrl
Enter
Submit Code
Ctrl
Shift
Enter
Format Code
Shift
Alt
F
Toggle Comment
Ctrl
/
Undo
Ctrl
Z
Redo
Ctrl
Y
Navigation
Global Search
/
Show Shortcuts
?
Close Modal
Esc