import java.util.*;

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