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

public  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.println(sum);
	}

}
