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];
		for(int i=0; i<n;i++) {
			p[i] = sc.nextInt();
		}

		Arrays.sort(p);

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

		System.out.println(x);

	}
	
}
