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- public boolean check1(){
- if(emptyL() && emptyR())
- return true;
- boolean left = true, right = true;
- if(isBlk()){
- if(!emptyL())
- left = getL().check1();
- if(!emptyR())
- right = getR().check1();
- }
- if(isRed()){
- if(!emptyL()){
- if(!getL().isBlk())
- return false;
- left = getL().check1();
- }
- if(!emptyR()){
- if(!getR().isBlk())
- return false;
- right = getR().check1();
- }
- }
- return (left && right);
- }
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