/* Program to form a pyramid of numbers. */

#include <stdio.h>

main()
{
	int i,j,n;
	printf("Enter the number of rows: ");
	scanf("%d",&n);
	if(n<1||n>9)
		printf("Invalid Argument\n");
	else
		for(i=0;i<n;i++)
		{
			for(j=0;j<n-i;j++)
				printf(" ");
			for(j=1;j<1+i;j++)
				printf("%d",j);
			for(;j>0;j--)
				printf("%d",j);
			printf("\n");
		}
}