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);
    }
}

