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[] arr = new int[n];
      for(int i = 0 ;i < n; i++)
        arr[i] = sc.nextInt();
      Arrays.sort(arr);
      int sum = 0;
      for(int i = 0; i < k; i++)
        sum += arr[i];
      System.out.println(sum);
  }
}