Problem:
Score : 200 points

Problem Statement

A shop sells N kinds of fruits, Fruit 1, \ldots, N, at prices of p_1, \ldots, p_N yen per item, respectively. (Yen is the currency of Japan.)

Here, we will choose K kinds of fruits and buy one of each chosen kind. Find the minimum possible total price of those fruits.

Constraints

1 \leq K \leq N \leq 1000

1 \leq p_i \leq 1000

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N K
p_1 p_2 \ldots p_N

Output

Print an integer representing the minimum possible total price of fruits.

Sample Input 1

5 3
50 100 80 120 80

Sample Output 1

210

This shop sells Fruit 1, 2, 3, 4, and 5 for 50 yen, 100 yen, 80 yen, 120 yen, and 80 yen, respectively.

The minimum total price for three kinds of fruits is 50 + 80 + 80 = 210 yen when choosing Fruit 1, 3, and 5.

Sample Input 2

1 1
1000

Sample Output 2

1000

Solution in Java (OpenJDK 11.0.6) (judge verdict: Accepted)

    import java.util.Arrays;
    import java.util.Scanner;
     
    public class Main {
     
        public static void main(String[] args) {
           
            Scanner sc = new Scanner(System.in);
            int n = sc.nextInt();
            int k = sc.nextInt();
            int[] a = new int[n];
            for (int i = 0 ; i < n ; i++) {
                a[i] = sc.nextInt();
            }
            Arrays.sort(a);
            int ans = 0;
            for (int i = 0 ; i < k ; i++) {
                ans += a[i];
            }
            System.out.println(ans);
        }
     
    }