[BOJ] 10808 알파벳 개수

https://www.acmicpc.net/problem/10808

10808번: 알파벳 개수

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

namespace _10808
{
    class Program
    {
        static void Main()
        {
            StreamReader sr = new StreamReader(Console.OpenStandardInput());
            StreamWriter sw = new StreamWriter(Console.OpenStandardOutput());
            StringBuilder sb = new StringBuilder();
            string str = Console.ReadLine();
            int[] arr = new int[26];
            for (int i = 0; i < str.Length; i++)
            {
                var idx = str[i] - 'a';
                arr[idx]++;
            }

            foreach (int a in arr)
            {
                sb.Append(a + " ");
            }
            Console.WriteLine(sb.ToString());
            
            sr.Close();
            sw.Flush();
            sw.Close();
        }
    }
    
}