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