شجرة الارقام ^_^

import java.util.Scanner;

public class DecimalTree {

public static void main (String [ ]potatoes){

int inInt=(new Scanner(System.in)).nextInt();

char c=' ';

int spaces;

for (int i=1;i<=inInt;i++,System.out.println()){

for(spaces=0;spaces<inInt-i;spaces++,System.out.printf("%4s",c));

   for(int j=inInt-spaces;j>0;System.out.printf("%4d",j--));

   for(int m=2;m<=i;System.out.printf("%4d",m++));

}

}

}