View Code of Problem 53

#include<stdio.h>
int main()
{
  int n,i,j;
  scanf("%d",&n);
  for(i=0;i<n;i++){
     for(j=0;j<=n-1-i;j++)
       printf(" ");
     for(j=0;j<=1+2*i;j++)
       printf("*");
    printf("\n");
  }
  for(i=0;i<n-1;i++){
     for(j=0;j<=i+1;j++)
       printf(" ");
     for(j=0;j<=(n+2)-2*i;j++)
       printf("*");
    printf("\n");
  }
  return 0;
}