Problem 1. Exercises: Stacks and Queues

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

namespace _01._Basic_Stack_Operations
{
    class Basic
    {
        static void Main(string[] args)
        {
            int[] numbers = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int[] numForQueue = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int minElement = int.MaxValue;
            bool result = false;

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

            for (int i = 0; i < numbers[1]; i++)
            {
                stack.Pop();
            }

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

            for (int i = 0; i < stack.Count; i++)
            {
                int currentElement =  stack.Pop();

                if (currentElement == numbers[2])
                {
                    result = true;
                    break;
                }
                if (currentElement < minElement)
                {
                    minElement = currentElement;
                }

            }

            if (result == true)
            {
                    Console.WriteLine("true");
            }
            else
            {
                Console.WriteLine(minElement);
            }

        }
    }
}