import java.util.Scanner;
import java.util.Arrays;

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 ans =0;
    for (int i =0; i<K; i++) {
      ans += p[i];
    }
    System.out.println(ans);
  }
}  