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0110.平衡二叉树JavaScript版本
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@ -142,7 +142,7 @@ int getDepth(TreeNode* node)
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2. 明确终止条件
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递归的过程中依然是遇到空节点了为终止,返回0,表示当前节点为根节点的书高度为0
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递归的过程中依然是遇到空节点了为终止,返回0,表示当前节点为根节点的树高度为0
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代码如下:
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@ -534,7 +534,34 @@ func abs(a int)int{
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return a
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}
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```
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JavaScript:
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```javascript
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var isBalanced = function(root) {
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//还是用递归三部曲 + 后序遍历 左右中 当前左子树右子树高度相差大于1就返回-1
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// 1. 确定递归函数参数以及返回值
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const getDepth=function(node){
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// 2. 确定递归函数终止条件
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if(node===null){
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return 0;
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}
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// 3. 确定单层递归逻辑
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let leftDepth=getDepth(node.left);//左子树高度
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if(leftDepth===-1){
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return -1;
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}
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let rightDepth=getDepth(node.right);//右子树高度
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if(rightDepth===-1){
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return -1;
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}
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if(Math.abs(leftDepth-rightDepth)>1){
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return -1;
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}else{
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return 1+Math.max(leftDepth,rightDepth);
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}
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}
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return getDepth(root)===-1?false:true;
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};
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```
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-----------------------
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