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.Collections.Generic;
using System.Linq;

namespace AtCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            var (N, K) = ReadLineInt2();

            var data = new List<int>();
            foreach(var p in ReadLineStr().Split(' '))
            {
                data.Add(Convert.ToInt32(p));
            }


            data = data.OrderBy(p => p).ToList();

            var sum = 0;
            for(var i = 0; i < K; i++)
            {
                sum += Convert.ToInt32(data[i]);
            }

            Console.WriteLine(sum);
        }


        #region 使いまわし
        static string ReadLineStr() { return Console.ReadLine(); }
        static int ReadLineInt() { return Convert.ToInt32(Console.ReadLine()); }
        static (int, int) ReadLineInt2()
        {
            var temp = Console.ReadLine().Split(' ');
            return (Convert.ToInt32(temp[0]), Convert.ToInt32(temp[1]));
        }
        #endregion
    }
}