codeforces 368A SerejaandCoatRack program in java

SerejaandCoatRack.java

import java.util.Arrays;
import java.util.Scanner;
public class SerejaandCoatRack
{
    public static void main(String[] args)
    {
        Scanner z=new Scanner(System.in);
        int n=z.nextInt();
        int d=z.nextInt();
        int[] a = new int[n];
        for(int i=0;i<n;i++)
            a[i]=z.nextInt();
        int m=z.nextInt();
        Arrays.sort(a);
        int sum=0;
        if(a.length>=m){
            for(int i=0;i<m;i++)
                sum+=a[i];
            System.out.println(sum);
        } else {
            for(int i=0;i<n;i++)
                sum+=a[i];
            System.out.println(sum-((m-n)*d));
        }
    }
}