using System;

//using System.Collections.Generic;

​

//using System.Text;

//Given two strings, write a method to decide if one is a permutation of the other?

public class Program

{

    public static void Main()

    {

        string s1="baabv";

        string s2="abbaa";

     if (string.IsNullOrEmpty(s1) || string.IsNullOrEmpty(s2))

          {

                Console.WriteLine("Not a anagram");

                return ;

          }

    if (s1.Length != s2.Length)

    {

        Console.WriteLine("Not a anagram");

        return ;

    }

        int[] letters= new int[256]; 

                    Console.WriteLine("cz"+ letters[4]);

​

        char[] s_array = s1.ToCharArray();

        foreach(char c in s_array)

        {

            letters[c]++;

        }

        for(int i =0;i<s2.Length;i++)

        {

            int c = s2[i];

            Console.WriteLine("c"+ letters[c]);

​

            if(--letters[c] <0)

            {

                Console.WriteLine("Not a anagram");

                return;     

            }           

        }       

        Console.WriteLine("Strings are anagram  "  + s1 + "    " + s2);

    }

}