Linkedin 新鲜面经

刚刚面完Linkedin，发面经求RP~

question1：

/**

* Given two words as Strings, determine if they are isomorphic. Two words are called isomorphic

* if the letters in one word can be remapped to get the second word. Remapping a letter means replacing all

* occurrences of it with another letter while the ordering of the lett

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commonAncestor(Node one, Node two);

}

class Node {

final Node parent;

final Node left;

final Node right;

public Node(Node parent, Node left, Node right) {

this.parent = parent;

this.left = left;

this.right = right;

}

bool isRoot() {

return parent == null;

}

}