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