累加出整个范围所有的数最少还需要几个数

import java.util.Scanner;
import java.util.Arrays;

public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int k=sc.nextInt();
        int[] arr=new int[n];
        for(int i=0;i<n;i++){
            arr[i]=sc.nextInt();
        }
        System.out.print(minNeed(arr,k));
    }
    public static int minNeed(int[] arr,int range){
        Arrays.sort(arr);
        int need=0;
        int touch=0;
        for(int i=0;i<arr.length;i++){
            while(arr[i]>touch+1){
                touch+=touch+1;
                need++;
                if(touch>=range){
                    return need;
                    
                }
            }
            touch+=arr[i];
            if(touch>=range){
                return need;
            }
        }
        while(range>=touch+1){
            touch+=touch+1;
            need++;
        }
        return need;
    }
}