# 0814. Binary Tree Pruning
###### tags: `Leetcode` `FaceBook` `Medium` `DFS`
Link: https://leetcode.com/problems/binary-tree-pruning/
## Code

class Solution {
    public TreeNode pruneTree(TreeNode root) {
        if(root == null) return null;
        root.left = pruneTree(root.left);
        root.right = pruneTree(root.right);
        if(root.left==null && root.right==null && root.val==0) return null;
        return root;
    }
}