import java.util.*;

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);
  }
}