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 C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var line1 = ReadInts();
        var line2 = ReadInts();
        var K = line1[1];
        var result = line2.OrderBy(n => n).Take(K).Sum();
        Console.WriteLine(result);
    }

    private static string Read() => Console.ReadLine();
    private static char[] ReadChars() => Array.ConvertAll(Read().Split(), a => a[0]);
    private static int ReadInt() => int.Parse(Read());
    private static long ReadLong() => long.Parse(Read());
    private static double ReadDouble() => double.Parse(Read());
    private static int[] ReadInts() => Array.ConvertAll(Read().Split(), int.Parse);
    private static long[] ReadLongs() => Array.ConvertAll(Read().Split(), long.Parse);
    private static double[] ReadDoubles() => Array.ConvertAll(Read().Split(), double.Parse);
}