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 arr[] = new int[n]; 
  
for(int i=0;i<n;i++) 
{
arr[i]=sc.nextInt();
} 
Arrays.sort(arr); 
int sum=0; 
for(int i=0;i<k;i++) 
{
   sum=sum+arr[i];
} 
System.out.print(sum);
  
}  
}  