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

  }
}