P01BasicStackOperation

using System;
using System.Collections.Generic;
using System.Linq;

namespace BasicStackOperations
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] commands = Console.ReadLine()
                .Split(new string[] { " ", "/t" }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .ToArray();

            int numbersToAdd = commands[0];
            int numbersToPop = commands[1];
            int numbersToSearchFor = commands[2];

            int[] numbers = Console.ReadLine()
                .Split(new string[] { " ","/t" }, StringSplitOptions.RemoveEmptyEntries)
                .Select(int.Parse)
                .ToArray();

            Stack<int> stack = new Stack<int>();

            for (int i = 0; i < numbersToAdd; i++)
            {
                stack.Push(numbers[i]);
            }

            for (int i = 0; i < numbersToPop; i++)
            {
                stack.Pop();
            }

            if (stack.Count == 0)
            {
                Console.WriteLine(0);
                return;
            }
            if (stack.Contains(numbersToSearchFor))
            {
                Console.WriteLine("true");
            }
            else
            {
                Console.WriteLine(stack.Min());
            }
        }
    }
}