2darr.cpp

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    int arr[n][m];
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < m; j++)
        {
            cin>>arr[i][j];
        }
        
    }
    int row_start=0,row_end=n-1,col_start=0,col_end=m-1;
    while (row_start<=row_end && col_start<=col_end)
    {   //row  start
        for (int col = col_start; col <=col_end; col++)
        {
            cout<<arr[row_start][col]<<" ";
        }
        row_start++;
        //column end
        for (int row = row_start; row <= row_end; row++)
        {
            cout<<arr[row][col_end]<<" ";
        }
        col_end--;
        //row  end
        for (int col = col_end; col >= col_start; col--)
        {
            cout<<arr[row_end][col]<<" ";
        }row_end--;
        
        //column start
        for (int row = row_end; row >= row_start; row--)
        {
            cout<<arr[row][col_start]<<" ";
        }
        col_start++;
    }
    
    
return 0;
}