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


}