import java.io.OutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Scanner; import java.util.Comparator; import java.util.ArrayList; /** * Built using CHelper plug-in * Actual solution is at the top * * @author silviase */ public class Main { public static void main(String[] args) { InputStream inputStream = System.in; OutputStream outputStream = System.out; Scanner in = new Scanner(inputStream); PrintWriter out = new PrintWriter(outputStream); No1046FruitsRush solver = new No1046FruitsRush(); solver.solve(1, in, out); out.close(); } static class No1046FruitsRush { public void solve(int testNumber, Scanner in, PrintWriter out) { int n = in.nextInt(); int k = in.nextInt(); ArrayList al = new ArrayList<>(); for (int i = 0; i < n; i++) { al.add(in.nextInt()); } al.sort(Comparator.reverseOrder()); int sum = al.get(0); for (int i = 1; i < k; i++) { if (al.get(i) > 0) { sum += al.get(i); } } out.println(sum); } } }