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Oct 24th, 2014
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  1. public boolean check1(){
  2. if(emptyL() && emptyR())
  3. return true;
  4.  
  5. boolean left = true, right = true;
  6.  
  7. if(isBlk()){
  8. if(!emptyL())
  9. left = getL().check1();
  10. if(!emptyR())
  11. right = getR().check1();
  12. }
  13.  
  14. if(isRed()){
  15. if(!emptyL()){
  16. if(!getL().isBlk())
  17. return false;
  18. left = getL().check1();
  19. }
  20. if(!emptyR()){
  21. if(!getR().isBlk())
  22. return false;
  23. right = getR().check1();
  24. }
  25. }
  26.  
  27. return (left && right);
  28. }
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