using System;using System.Collections.Generic;namespace _1kRl{class Program{
class M{Dictionary<string,char>d=new Dictionary<string,char>();int p=9,x,y,u,
v;char a='@',w='#',f='.';Random r=new Random();public M(){x=p;y=p;d[S(x,y)]=a;
ConsoleKey k = K();while(k!=ConsoleKey.Escape){Console.Clear();u=x;v=y;switch
(k){case ConsoleKey.LeftArrow:x--;break;case ConsoleKey.RightArrow:x++;break;
case ConsoleKey.UpArrow:y--;break;case ConsoleKey.DownArrow:y++;break;}if(C(S(
x,y))==w){x=u;y=v;}d[S(u,v)]=f;d[S(x,y)]=a;for(int j=0;j<p*2-1;j++){for(int
i=0;i<p*2-1;i++){Console.Write(C(S(i-p+x,j-p+y)));}Console.WriteLine();}k=K();
}}string S(int x,int y){return String.Format("{0}_{1}",x,y);}int L(String s,
int l){return Convert.ToInt32((s.Split('_'))[l]);}char C(String s){if(
d.ContainsKey(s))return d[s];return d[s]=r.Next(9)<8?f:w;}ConsoleKey K(){
return(Console.ReadKey(true)).Key;}}static void Main(string[]args){M m=new
M();}}}