Stacks and Queues - 01. Basic Stack Operations

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

namespace Advanced
{
    class Program
    {
        static void Main(string[] args)
        {
            var numbersToOperate = Console.ReadLine().Split();
            var numbersToAdd = int.Parse(numbersToOperate[0]);
            var numbersToRemove = int.Parse(numbersToOperate[1]);
            var numberToCheck = int.Parse(numbersToOperate[2]);

            var digits = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var stack = new Stack<int>();

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

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

            if (stack.Contains(numberToCheck))
            {
                Console.WriteLine("true");
            }

            else if (stack.Count == 0)
            {
                Console.WriteLine("0");
            }

            else
            {
                int minNumber = int.MaxValue;

                while (stack.Count != 0)
                {
                    int currentNumber = stack.Pop();

                    if (currentNumber < minNumber)
                    {
                        minNumber = currentNumber;
                    }
                }
                Console.WriteLine(minNumber);
            }
        }
    }
}