diamond pattern(*)

#include<stdio.h>
int main()
{
    int n,i,j;
    scanf("%d",&n);
    for(i=0; i<2*n-1; i++)
    {
        if(i<n)
        {
            for(j=0; j<2*n-1; j++)
            {
                if(j<n&&j>=n-1-i)
                    printf("* ");
                else if(j>=n&&j<=n-1+i)
                    printf("* ");
                else
                    printf("  ");
            }
            printf("\n");
        }
        else if(i>=n)
        {
            for(j=0; j<2*n-1; j++)
            {
                if(j<n&&j>=i-n+1)
                    printf("* ");
                else if(j>=n&&j<=3*n-i-3)
                    printf("* ");
                else
                    printf("  ");
            }
            printf("\n");
        }
    }
}