import java.util.*;
import java.math.RoundingMode;
import java.math.BigDecimal;
 
 
 
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.sort(p);
		int ans = 0;
		for(int i = 0; i < k; i++) {
			ans+=p[i];
		}
		System.out.println(ans);
	 }
}