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);
	}
	
}