
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 sum = 0;
		int p[] = new int[N];
		for (int i = 1; i <= N; i++) {
			p[i] = sc.nextInt();
		}
		Arrays.sort(p);

		for (int i = 1; i <= K; i++) {
			sum += p[i];
		}
      
System.out.println(sum);
	}
}
