import java.util.Scanner;
public class Main
{
  public static void main(String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    int k = sc.nextInt();
    int[] p = new int[n];
    
    for(int i = 0; i < n; i++)
    {
      p[i] = sc.nextInt();
    }
    Arrays.sort(p);
    int resut = 0;
    for(int i = 0; i < k; i++)
    {
      result += p[i];
    }
    System.out.println(result);
  }
}
