#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    if(n < 0 )
    {
        printf("Invalid Input\n");
        return 0;
    }
    if(n == 0)
    {
        printf("1\n");
        return 0;
    }
    int size = 2 * n-1;
    for(int i =0; i < size; i++)
    {
        for(int j =0; j < size; j++)
        {
            int top=i;
            int left=j;
            int bottom = size-1-i;
            int right = size-1-j;
            int main = top;
            if(j<min)min = left;
            if(bottom<min)min = bottom;
            if(rught<min)min = right;
            printf("%d",n min);
    }
    printf("\n");
}
return 0;
}