import java.util.*;    
public class main{
      public static void main(String []args){
        Scanner sc = new Scanner(System.in);
       int n sc.nextInt();
        int a[] = new int[n];
        int k = sc.nextInt();
        for (int i=0; i<n; i++){
          a[i]=sc.nextInt();
        }
        Arrays.sort(a);
        int ans=0;
        for(int i=0; i<k; i++){
          ans+=a[i];
        }
        System.out.println(ans);
      }
     }