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

		Arrays.sort(p);

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