import java.util.*;
class Main {
	public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt(),k=sc.nextInt();
        int[]p = new int[n];
        for(int i = 0;i<n;i++) p[i] = sc.nextInt();
        Arrays.sort(p);
        int ans = 0;
        for(int i = 0;i<k;i++) ans += p[i];
        System.out.println(ans);
    }
}
