import java.util.*;
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.print(sum);

	}
}
