#include <stdio.h>
int main(void)
{
int i,j,k,l,b,n;
printf("How many numbers? ");
scanf("%d",&n);
for(i=0;i<n;i++)
{
for(l=0;l<i;l++)
printf(" ");
for(j=i+1;j<=n;j++)
printf("%d",j);
for(k=n-1;k>i;k--)
printf("%d",k);
printf("\n");
}
b=n-1;
for(i=0;i<n-1;i++)
{
for(l=n-2;l>i;l--)
printf(" ");
for(j=b;j<=n;j++)
printf("%d",j);
for(k=n-1;k>=b;k--)
printf("%d",k);
printf("\n");
b--;
}
return 0;
}
/*
run:
How many numbers? 5
123454321
2345432
34543
454
5
454
34543
2345432
123454321
*/