Leetcode--populating Next Right pointers in each Node II

Source: Internet
Author: User

Follow up to Problem "populating Next right pointersin each Node".

What if the given tree could is any binary tree? Would your previous solution still work?

Note:

    • Constant extra space.

For example,
Given The following binary tree,

         1       /        2    3     /\        4   5    7

After calling your function, the tree is should look like:

         1, NULL       /        2, 3, null     /\        4-> 5, 7, NULL

/** * Definition for binary tree with next pointer. * struct Treelinknode {*  int val; *  Treelinknode *left, *right, *next; *  treelinknode (int x): Val (x), left (N ULL), right (null), Next (null) {} *}; */class Solution {public:    void Connect (Treelinknode *root)     {        if (root = NULL)            return;        queue<treelinknode*> use;        Use.push (root);        while (!use.empty ())        {            int s = use.size ();            for (int i=0; i<s; i++)            {                treelinknode* t = Use.front ();                Use.pop ();                if (i = = s-1)                    t->next = NULL;                else                     T->next = Use.front ();                if (t->left! =  NULL)                    Use.push (t->left);                if (t->right! = NULL)                    use.push (t->right);}}}    ;


Leetcode--populating Next Right pointers with each Node II

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