import java.util.Arrays;
import java.util.Scanner;

public class Main {

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 整数の入力
		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 s= 0;
		for( int i=0 ; i<k ; i++ ) {
			s += p[i];
		}
		
		System.out.println(s);
	}

}