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- Anonymous
- Tuesday, March 25th, 2008 at 12:52:12pm MDT
- #include<stdio.h>
- #include<stdlib.h>
- #include<unistd.h>
- #include<signal.h>
- #include<sys/wait.h>
- uc S=1,cr=0, W; ul sk [1024],d,tr; int sp=0,sp1=~0, sp2=~1; pid_t
- p,t; void ss (){ w(S!=W){ kill(t,S1); S=((S<<1)&0xff?S<<1:1); pa(
- ); } kill(t,S2); pa(); } ul AD(ul a,ul b){ do{ a^=b; b=((b^a) &b)
- <<1; }w(b); return a; }ul SU(ul a,ul b){ return AD(a,AD(~b,1)); }
- ul MU (ul a
- ,ul b ){ ul
- e,g,f ,c; e
- =a; g =0; w
- (b>1) { c=2
- ; f=a << 1;
- w(c<b >>1){
- c<<=1 ;f<<=
- 1;} g =AD(f
- ,g); b=SU(b,c); } a=g; if(b){a=AD(a,e); } return a; } ul DI( ul a
- ,ul b){ ul t,u=0;w(MU(u,b)<a){ t=1; w(MU(AD(t<<1,u),b)<a){t<<= 1;
- } u=AD(u,t);} if(MU(u,b)>a){ u=AD(u,~0);} return u;}void SC(int i
- ){S=((S<<1)&0xff?(S<<1)&0xff:1);sg(i,&SC);kill(p,S1);}void DS(int
- i){ cr=0; switch(S){ case 1:sk[sp]|=d;case 2:d<<=1;if(!d){sp2=sp1
- ; sp1=sp ; sp=AD(
- sp,1);sk [sp] =0;
- } break; case 4 : case 8 : case 16: case 32: cr=S;d=0
- ; break; case 64: if (sp > 0 ){ sp2 =SU (sp2 ,1); sp1
- =SU (sp1 ,1); sp= SU(sp,1) ; } else { sp =0; sp1= ~0;
- sp2 =~1; } sk [sp
- ]=0; d=0 ; break; case 128 : if( sp >1) {sk[ sp1]^=sk[
- sp2];sk[ sp2]^=sk [sp1];sk [sp1] ^= sk [ sp2 ]; } d=0
- ; break; } sg (i, &DS); if (d)kill( p,S1); } void Sync
- ( int i) { sg(i,&
- Sync); } void main (void) { p=getpid ( ); sg( S1,&Sync
- );if((t= fork())) { char a [80];pa( );w(1){W =2;scanf
- ("%s",a) ; switch (a[0]) { case 83: W <<= 1; case 68:
- W <<= 1; case 43:
- W <<= 1; case 45: W <<= 1; case 47: W <<= 1; case 42:
- W <<= 1; break ; case 81: kill(t,9 );exit(0 );break;
- default : W=0; tr= atoi(a); break; } if(W)ss( ); else{
- d=1; w(d ){ W=tr&
- d?1:2; d <<=1; ss (); } }} wait(0); }else{ul j;sg(S1,
- &SC); sg (S2,&DS) ; kill(p ,S1); w( 1){ w(d) pa(); d=
- 1; if(cr &&sp >1) {switch( cr){case 4:sk[sp2 ]=MU(sk[
- sp2 ],sk [sp1] );
- break; case 8:sk[sp2]=DI(sk[sp2],sk[sp1]); break; case 16:sk[sp2]
- =SU(sk[sp2],sk[sp1]); break; case 32:sk[sp2]=AD(sk[sp2],sk[sp1]);
- break; } sp=sp1; sp1=sp2; sp2=SU(sp2,1); sk[sp]=0; }pr("====\n");
- for(j=0; j<sp; ){ pr("%lu\n",sk[j]); j=AD(j,1); }kill(p,S1); } }}
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