import java.util.*;
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 sum=0;
    for(int i=0;i<k;++i)
      sum+=p[i];
    System.out.println(sum);
  }
}