#include <stdio.h>#include <malloc.h>#include <string.h>#define A(x) (e^d)&i?e:(e+=i+i/15-d,d<<=4,i<<=4,x)#define B b+=!((e^d)&i)&&(d|=i),i<<=4,#define C i=15,B B B B d=d<<4|d>>12,#define D=(d=g,b=0,C b<<=4, C C C b)#define E if(**y)goto#define F=a[rand()%c]#define G unsigned short#define H e^=a[z],a[z]^=e,e^=a[z],void    main	(int	    z,char		**y)		    {G*a			,b,c			    ,d,e				,f,g				    ,h,i					;*(*					    y+=						strlen						    (*y)							-1)^=							    'd';								srand								    (time									(0))									    ;z==									2&&								    sscanf								(y[1							    ],"%d"							,&z)						    &&z?						0:(z					    =6);					if(!				    (a=(				G*)			    calloc(			z*z*		    z*z,		sizeof	    (G))	)){    printf("No\    memory\	\n");	    exit		(1);		    }for			(c=1			    ;i=15				,d=z				    ,c<z					*z*z					    *z&&						(e=a						    [c-1							]+1,							    a[c]								=A(A								    (A(A									(0))									    )),1									);c++								    );*(								**y?							    &g:&							e)F;						    do{						printf					    ("(%d): ????\b\b\b\b"					,c);E				    q0;else				goto			    q1;q0:			printf		    ("%04X\n"		,g+	    4369	);E    q2;q1:scanf    ("%hx"	,**y	    ?&h:		&g);		    E q3			;g-=			    4369				;q2:				    printf					("??\b\b"					    );E q1;						printf(						    "%02x\n"							,h D							    );q3								:for								    (z=f									=0;(									   z<c||									(c=f								    ,0))								&&(H							    b D!=							h,H b						    ||(a[						f++]=					    a[z])					,1);z				    ++);				}while			    (h!=			64&&		    c>0&&		((g F	    ),1)	);printf    ("\n");}