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Q4_10_Check_Subtree serializing mistake #226

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navimakarov opened this issue Dec 30, 2021 · 0 comments

navimakarov commented Dec 30, 2021

CtCI-6th-Edition/Java/Ch 04. Trees and Graphs/Q4_10_Check_Subtree/QuestionA.java

Line 23 in 59018cf

sb.append(node.data); // Add root

There should be a delimiter, because
11
1 2
1 2

AND
1
11 2
1 2

Are serialized exactly the same way -> "1111XXX2X2XX"
But adding a delimiter will serialize them as

"11 1 1 XXX2 X2 XX"
"1 11 1 XXX2 X2 XX"

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