import java.util.*;
public class Main {
public static void main(String args[]) {
Scanner scn = new Scanner (System.in);
int n = scn.nextInt();
int a = scn.nextInt();
int [] arr = new int[n];
for(int i=0;i<n;i++){
arr[i]=scn.nextInt();
}
bubblesort(arr);
int [] arr1 = new int [n];
int sum=0;
for(int i=0;i<n;i++){
sum=arr[i]-arr[0];
arr1[i]=sum;
}
int max =arr1[0];
for(int j=0;j<n;j++){
if(arr1[j]>max && arr1[j]*a<=arr[n-1])
max=arr1[j];
}
System.out.println(max);
}
public static void bubblesort(int [] arr ){
for(int i=0;i<arr.length-1;i++){
for(int j=0;j<arr.length-1-i;j++){
if(arr[j]>arr[j+1]){
int temp = arr[j];
arr[j]=arr[j+1];
arr[j+1]=temp;
}
}
}
}
}
This code is solving 2 test cases but for rest of the test it is showing wrong ans ,So please Help Me