Reverse Spiral Form of Matrix
Medium Accuracy: 45.09% Submissions: 897 Points: 4

Given a matrix as 2D array, print the matrix in reverse spiral form.

Input:
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case contains two integers m and n denoting the size of the matrix(m X n). The next line contains m*n space separated integers in row-wise form.

Output:
Print the matrix in reverse spiral form.

Constraints:
1<=T<=10^5
1<=m,n<=10^5
1<=a[m,n]<=10^5

Example:
Input:

1
3 6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Output:
11 10 9 8 7 13 14 15 16 17 18 12 6 5 4 3 2 1

to report an issue on this page.

Editorial

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

Yes

All Submissions

My Submissions:

Login to access your submissions.