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 < p.length; i++) {
			p[i] = sc.nextInt();
		}
		Arrays.sort(p);
		for (int i = 0; i < K; i++) {
			ans += p[i];
		}
		System.out.println(ans);
	}
}
