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picture1_Hacking A Google Interview Practice Questions Person B


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 133x       Filetype PDF       File size 0.07 MB       Source: courses.csail.mit.edu


File: Hacking A Google Interview Practice Questions Person B
HackingaGoogleInterviewPracticeQuestions– PersonB Question:BinarySearchTreeValidity Writeafunctiontodeterminewhetheragivenbinarytreeofdistinctintegersisa validbinarysearchtree.Assumethateachnodecontainsapointertoitsleftchild,a pointertoitsrightchild,andaninteger,butnotapointertoitsparent.Youmayuse anylanguageyoulike. GoodAnswer:Notethatit'snotenoughtowritearecursivefunctionthatjustchecks iftheleftandrightnodesofeachnodearelessthanandgreaterthanthecurrent node(andcallsthatrecursively).Youneedtomakesurethatallthenodesofthe subtreestartingatyourcurrentnodearewithinthevalidrangeofvaluesallowedby thecurrentnode'sancestors.Thereforeyoucansolvethisrecursivelybywritinga helperfunctionthatacceptsacurrentnode,thesmallestallowedvalue,andthe largestallowedvalueforthatsubtree.Anexampleofthisisthefollowing(inJava): boolean isValid(Node root) { ...

icon picture PDF Filetype PDF | Posted on 05 Feb 2023 | 2 years ago

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...Hackingagoogleinterviewpracticequestions personb question binarysearchtreevalidity writeafunctiontodeterminewhetheragivenbinarytreeofdistinctintegersisa validbinarysearchtree assumethateachnodecontainsapointertoitsleftchild a pointertoitsrightchild andaninteger butnotapointertoitsparent youmayuse anylanguageyoulike goodanswer notethatit snotenoughtowritearecursivefunctionthatjustchecks iftheleftandrightnodesofeachnodearelessthanandgreaterthanthecurrent node andcallsthatrecursively youneedtomakesurethatallthenodesofthe subtreestartingatyourcurrentnodearewithinthevalidrangeofvaluesallowedby thecurrentnode sancestors thereforeyoucansolvethisrecursivelybywritinga helperfunctionthatacceptsacurrentnode thesmallestallowedvalue andthe largestallowedvalueforthatsubtree anexampleofthisisthefollowing injava boolean isvalid root return isvalidhelper integer min value max curr int if left null false right true therunningtimeofthisalgorithmiso n oddmanout you regivenanunsortedarrayofintegerswhereeve...
								

							

						
	
												
				
					
					
					
			
					
				
				
		
	

	
		





	

	
				

						

						
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										Category:  Uncategorized / Uncategorized 
										
Posted on: 05 Feb 2023 | 2 years ago
										
										
Tag:
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																								hacking,
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Filetype: PDF
										
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