	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 t = 0;
		for ( int i=0; i<k; i++ ) {
			t += p[i];
		}

		System.out.println(t);
	}
}
