
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

public class C {
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
    public static void main(String[] args) {
        FastReader fr = new FastReader();
        int n = fr.nextInt();
        int k = fr.nextInt();
        ArrayList<Integer> arrayList = new ArrayList<>();
        for(int i=0;i<n;i++){
            int val = fr.nextInt();
            arrayList.add(val);
        }
        Collections.sort(arrayList);
        int ans = 0;
        for(int i=0;i<k;i++){
            ans+=(arrayList.get(i));
        }
        System.out.println(ans);
    }
}