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];
    int ans = 0;
    for(int i=0 ; i<n ; i++){
      p[i] = sc.nextInt();
    }

    Arrays.sort(p);

    for(int i=0 ; i<k ; i++){
      ans += p[i];
    }
    System.out.println(ans);
  }
}
