View Code of Problem 57

#include<stdio.h>
int main()
{
	int i,j,k,n;
  	scanf("%d",&n);
  	if(n>=1&&n<=9)
        {
        	for(i=1;i<=n;i++)
        {
        	for(j=1;j<=n-i;j++)printf(" ");
          	for(k=1;k<=i;k++)printf("%d",k);
          	for(k=i-1;k>=1;k--)printf("%d",k);
          	printf("\n");
        }
  	for(i=n-i;i>=1;i--)
        {
        	for(j=1;j<=n-i;j++)printf(" ");
          	for(k=1;k<=i;k++)printf("%d",k);
          	for(k=i-1;k>=1;k--)printf("%d",k);
          	printf("\n");
        }
        }
  	return 0;
}