/********************************************
* Section : 15
* Machine No. : N
* Roll No. : 19CS100XY
* Name : Aritra Hazra
* Assignment No : 3C
* Description : Boundary Drawing with Numbers
*********************************************/

#include<stdio.h>

int main()
{
    int i, j, n;
    
    printf("Enter Positive Number for Outermost Boundary [1-99]: ");
    scanf("%d", &n);
    if (n<=0) {
        printf("Error: Boundary cannot be designed!\n");
    }
    else {
        printf("The Drawing:\n");
        for (i=n; i>1; i--) {
            for (j=n; j>=1; j--) {
                if (j>i)
                    printf("%3d", j);
                else
                    printf("%3d", i);
            }
            for (j=2; j<=n; j++) {
                if (j>i)
                    printf("%3d", j);
                else
                    printf("%3d", i);
            }
            printf("\n");
        }
        for (i=1; i<=n; i++) {
            for (j=n; j>=1; j--) {
                if (j>i)
                    printf("%3d", j);
                else
                    printf("%3d", i);
            }
            for (j=2; j<=n; j++) {
                if (j>i)
                    printf("%3d", j);
                else
                    printf("%3d", i);
            }
            printf("\n");
        }
    }

    return 0;
}