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(),k=sc.nextInt(),ans=0;
	int [] a = new int [n];
	for (int i=0;i<n;i++) a[i]=sc.nextInt();
	Arrays.sort(a);
	for (int i=0;i<k;i++) {
		ans+=a[i];
	}
	System.out.println(ans);
	sc.close();}}