spiral_display.java

import java.io.*;
import java.util.*;

public class spiral_display{
	public static void main(String args[]) throws Exception{
		Scanner scn = new Scanner(System.in);

		int n = scn.nextInt();
		int m = scn.nextInt();

		int[][] arr = new int[n][m];

		for(int i = 0;i<arr.length;i++){
			for(int j = 0; j < a[0].length; j++){
				arr[i][j] = scn.nextInt();
			}
		}


		int minr = 0;
		int minc = 0;

		int maxr = arr.length - 1;
		int maxc = arr[0].length - 1;

		int count = 0;
		int tne = n * m;

		while(count < tne){
			// left wall

			 for(int i = minr, j = minc; i <= maxr && count < tne; i++){
			 	System.out.println(arr[i][j]);
			 	count++;
			 }
			 minc++;

			// bottom wall

			 for(int i = maxr, j = minc; j <= maxc && count < tne; j++){
			 	System.out.println(arr[i][j]);
			 	count++;
			 }
			 maxr--;

			// right wall
			 for(int i = maxr, j=maxc; i >= minr && count < tne; i--){
			 	System.out.println(arr[i][j]);
			 	count++;
			 }
			 maxc--;

			// top wall
			 for(int i = minr, j = maxc; j >= minc && count < tne; j--){
			 	System.out.println(arr[i][j]);
			 	count++;
			 }
			 minr++;
		}
	}
}