[백준] C# : X보다 작은 수 (10871번)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Baekjoon
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] s = Console.ReadLine().Split();
            int n = int.Parse(s[0]);
            int x = int.Parse(s[1]);

            StringBuilder input = new StringBuilder(Console.ReadLine());
            string[] numbers = input.ToString().Split(' ');
            StringBuilder result = new StringBuilder();

            foreach (string num in numbers)
            {
                if (int.Parse(num) < x)
                {
                    result.Append(num + " ");
                }
            }
            Console.WriteLine(result);
        }
    }
}