import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int N = scan.nextInt();
		int K = scan.nextInt();
		int[] p = new int[N];
		for (int i = 0; i < N; i++) {
			p[i] = scan.nextInt();
		}
		Arrays.sort(p);

		int sum = 0;

		for (int i = 0; i < K; i ++) {
			sum += p[i];
		}

		System.out.println(sum);
	}

}