Ch2.java

import java.util.*;

public class Ch2
{
	public static void main(String[] vars){
		Scanner sc=new Scanner(System.in);
		System.out.println("type n :\n");
		int n=sc.nextInt();
		System.out.println("type k :\n");
		calc(n,sc.nextInt());
		
		
	}
	public static void calc(int n,int k){
		int a=100;
		int ns=1;
		while(a<1000000000){
			StringBuilder strb=new StringBuilder(String.valueOf((a*k)));
			//System.out.println(strb.reverse().toString());
			if((Integer.valueOf(strb.toString()))==(Integer.valueOf((strb.reverse().toString())))*4)
			{
				
				if(ns==n){
					System.out.println(strb.toString());
					
					break;}
				ns++;
			}
			a++;
		}
		if(a>=1000000000){System.out.println("N");}
	}
}

یه خرده طول میکشه حساب کردنش