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];
        int sum = 0;
        Arrays.sort(A);
        for (int i = 0; i < K; i++) {
            sum += A[i];
        }
        System.out.println(sum);

    }

}
