Day13_LEETCODE_199. Binary Tree Right Side View.ipynb

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    "# Definition for a binary tree node.\n",
    "# class TreeNode(object):\n",
    "#     def __init__(self, val=0, left=None, right=None):\n",
    "#         self.val = val\n",
    "#         self.left = left\n",
    "#         self.right = right\n",
    "class Solution(object):\n",
    "    def rightSideView(self, root):\n",
    "        \"\"\"\n",
    "        :type root: TreeNode\n",
    "        :rtype: List[int]\n",
    "        \"\"\"\n",
    "        rightvalues=[]\n",
    "        q = collections.deque([root])\n",
    "        #Breadth-First Search  \n",
    "        while q:\n",
    "            # for each level\n",
    "            rightmost= None\n",
    "            qlen= len(q)\n",
    "            for i in range(qlen):\n",
    "                node= q.popleft()\n",
    "                if node:\n",
    "                    rightmost=node\n",
    "                    q.append(node.left)\n",
    "                    q.append(node.right)\n",
    "            if rightmost:\n",
    "                rightvalues.append(rightmost.val)\n",
    "        return  rightvalues      \n"
   ]
  }
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