[ BOJ/C# ] 10828 스택

https://www.acmicpc.net/problem/10828

10828번: 스택

https://learn.microsoft.com/ko-kr/dotnet/api/system.collections.generic.stack-1?view=net-7.0 

Stack<T> 클래스 (System.Collections.Generic)

이번엔 switch 문을 이용하여 풀어보았다. 훨씬 가독성이 좋은 듯하다. 

using System;

namespace _10828
{
    class Program
    {
        static void Main()
        {
            StreamReader sr = new StreamReader(Console.OpenStandardInput());
            StreamWriter sw = new StreamWriter(Console.OpenStandardOutput());

            int n = int.Parse(sr.ReadLine());
            Stack<int> stack = new Stack<int>();

            for(int i=0; i < n; i++)
            {
                string[] str = sr.ReadLine().Split(' ');

                switch (str[0])
                {
                    case "push":
                        stack.Push(int.Parse(str[1]));
                        break;
                    case "pop":
                        if (stack.Count == 0) goto default;
                        sw.WriteLine(stack.Pop());
                        break;
                    case "size":
                        sw.WriteLine(stack.Count());
                        break;
                    case "empty":
                        if (stack.Count == 0) sw.WriteLine("1");
                        else sw.WriteLine("0");
                        break;
                    case "top":
                        if (stack.Count() == 0) goto default;
                        else sw.WriteLine(stack.Peek());
                        break;
                    default:
                        sw.WriteLine("-1");
                        break;
                }
            }
            sr.Close();
            sw.Flush();
            sw.Close();
        }
    }
}