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

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 ans=0;

		for(int i=0; i<n; i++) {
			p[i] = sc.nextInt();
		}

		Arrays.sort(p);

		for(int i=0; i<k; i++) {
			ans += p[i];
		}

		System.out.println(ans);

		sc.close();

	}

}
