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;

namespace AtCoder0621
{
	class Program
	{
		static void Main(string[] args)
		{
			B();
		}

		static void B()
		{
			var ints = Console.ReadLine().Split().Select(x => int.Parse(x)).ToArray();
			var k = ints[1];
			var a = Console.ReadLine().Split().Select(x => int.Parse(x)).ToArray();
			Array.Sort(a);

			Console.WriteLine(a.Take(k).Sum());
		}

		static void A()
		{
			var s = Console.ReadLine();
			if (s == s.ToLower())
				Console.WriteLine('a');
			else
				Console.WriteLine('A');
		}
	}
}