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