#include<stdio.h>
void main()
{
int n;
do
{
printf("How many lines you want to printn");
scanf("%d",&n);
}
while((n<1)||(n>9));
for(int i=1;i<=n;i++)
{
for(int j=1;j<=(n-i);j++)
printf(" ");
for(j=1;j<=i;j++)
printf("%d",j);
for(j=(i-1);j>=1;j--)
printf("%d",j);
printf("n");
}
}
