#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define comp 1
#define m 1024
typedef unsigned char ch;
typedef struct {ch s[256]; ch i; ch j;} state;
typedef void MV(ch *, state *, int);
void initst(state *, ch *);
MV mv, mv1;
void pr(ch* s){
  int j; for(j=0; j<256; ++j) printf("%s%02x", j&31?"":"\n", s[j]);
  printf("\n");}
int main(int argc, char * * args){
void try(ch* k, MV mv, state * st){initst(st, (ch*)args[1]);
  {int jx=1<<17; while(jx--) mv(k, st, m);}
// Histogram:
  if(0){int h[256]; {int j = 256; while (j--) h[j] = 0;}
    {int j = m; while(j--) ++h[k[j]];}
    {int j; for(j=0; j<256; ++j){if(!(j&15)) printf("\n %02x ", j);
       printf("%d ", h[j]);} printf("\n");}}
// Test if state is still a permutation.
  {ch x[256]; {int j=256; while(j--) x[j]=1;}
     {int j=256; while(j--) x[st->s[j]]=0;}
     {int j=256; while(j--) if(x[j]) printf("No %d\n", j);}}}
if(argc <2) exit(printf("Gimme key!!\n"));
if(comp) {
    state st, st1;
    ch k[m], l[m];
    try(k, mv, &st); try(l, mv1, &st1);
    {int j=m; while(j--) if(k[j]!=l[j]) printf("differs at %d\n", j);}
    {int j=256; while(j--) if(st.s[j]!=st1.s[j])
       exit(printf("Differs at %d %02x %02x\n", j, st.s[j], st1.s[j]));}
    if(1) pr(st.s);
     printf("Good stuff\n");}
 return 0;}