#include<stdio.h>
#include<conio.h>
#define n 4
void main()
{
	int A[n][n]={{1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,16}};
	int min=0,max=n-1,i,j;
	clrscr();
	while(min<max)
	{
		for(i=min;i<=max;i++)
			printf("%d,",A[min][i]);
		for(i=min+1;i<=max;i++)
			printf("%d,",A[i][max]);
		for(i=max-1;i>=min;i--)
			printf("%d,",A[max][i]);
		for(i=max-1;i>min;i--)
			printf("%d,",A[i][min]);
		min++;
		max--;
	}
	getch();
}