#include <stdio.h>
#include <string.h>
//
//super xek keygen by ZaCo for drmist crackme :)
//
int main(int argc, char* argv[])
 {
  char nickname[]="ZaCo";
  char charset[]="ABCDEFGHIJKLMNOP";
  int cs_len=strlen(charset);

  char key[0x20];
  char BL=0,DL=0,BH,DH;
  //
  int i=0, len=strlen(nickname);
  for(;;)
   {
    BL+=nickname[i++];
    if(i>len) break;
    DL+=nickname[i++];
    if(i>len) break;
   }

  BL--;
  memset(key,charset[0],0x20);
  //ïîäñòðàèâàåì key ïîä BL

  DH=charset[0]*0x10;

  unsigned char temp=BL-DH;
  i=1;
  while(temp>cs_len-1)
   {
    temp-=cs_len-1;
    key[i]=charset[cs_len-1];
    i+=2;
   }
  key[i]=charset[temp];
  DH=BL;

  //ïîëó÷àåì íóæíûé BH
  BH=((0xB1-DH)^DL)-BL;

  //ïîäñòðàèâàåì key ïîä BH

  temp=BH-charset[0]*0x10;
  i=0;
  while(temp>cs_len-1)
   {
    temp-=cs_len-1;
    key[i]=charset[cs_len-1];
    i+=2;
   }
  key[i]=charset[temp];
  //
  printf("%20s",key);
  return 0;
 }
//---------------------------------------------------------------------------