View Code of Problem 57

#include<stdio.h>
int main()
{
  int n,i,j,k;
  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-1;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;
}