using C=System.Console;using System;partial class L{static void R(){C.SetCursorPosition(0,0);}static void W(string s){C.Write(s);}static void N(string s){W(s+"\n");}static void F(int c){C.ForegroundColor=(System.ConsoleColor)c;}static string E(){return C.ReadLine();}static int I{get{if(Type.GetType("Mono.Runtime")!=null){int i=(int)C.ReadKey(true).Key;return i>48&&i<58?i+48:i;}return(int)C.ReadKey(true).Key;}}}