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();
		}
		java.util.Arrays.sort(p);
		int ans = 0;
		for(int i = 0; i < k; i++) {
			//System.out.println(p[i]);
			ans+= p[i];
		}
		System.out.println(ans);
	}
}