Poj Solution 3627

http://poj.org/problem?id=3627

//* @author 
import java.io.*; 
import java.util.*; 
import java.math.*; 
public class Main 
{ 
    static int[] bookHeight; 
    static int n; 
    static BigInteger b; 
    public static void main(String[] args) throws Exception 
    { 
        readFile(); 
    }    
    public static void readFile() throws Exception 
    { 
        BufferedReader br = new BufferedReader( 
            new InputStreamReader(System.in)); 
        StringTokenizer st = new StringTokenizer( 
            br.readLine()," "); 
        n = Integer.valueOf(st.nextToken()); 
        b = new BigInteger(st.nextToken()); 
        int iCount = 0; 
        bookHeight = new int[n]; 
        while(iCount< n) 
        { 
            bookHeight[iCount++] = Integer.valueOf( 
                br.readLine());  
        } 
        process(); 
    } 
    public static void defbug() 
    { 
        for(int i=0; i< bookHeight.length; i++) 
            System.out.println(bookHeight[i]+" "); 
        System.out.println(); 
    } 
    public static void process() 
    { 
        Arrays.sort(bookHeight); 
        BigInteger sum = BigInteger.valueOf(0L); 
        BigInteger temp; 
        int iCount = 0; 
        for(int i=bookHeight.length-1; i>=0; i--) 
        { 
            sum = sum.add(BigInteger.valueOf( 
                    (long)(bookHeight[i]))); 
            temp = sum.max(b); 
            iCount++; 
            if(temp.equals(sum)) 
                break;   
        } 
        System.out.print(iCount); 
    } 
}