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();
		}
		
		Arrays.parallelSort(p);

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