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+package com.dw.leetcode;%0A%0A%0A%0A%0Apublic class Minimum_Distance_Between_BST_Nodes_783 %7B%0A%0A%09class TreeNode %7B%0A%09%09int val;%0A%09%09TreeNode left;%0A%09%09TreeNode right;%0A%09%09TreeNode(int x) %7B val = x; %7D%0A%09%7D%0A%09%0A%09public int minDiffInBST(TreeNode root) %7B%0A        int result = 0;%0A        if(root == null) return 0;%0A        %0A        help(root);%0A        %0A        return result;%0A    %7D%0A%09%0A%09public void help(TreeNode root) %7B%0A%09%09if(root == null) return; %0A%09%09%0A%09%09help(root.left);%0A%09%09%0A%09%09help(root.right);%0A%09%7D%0A%09%0A%09public static void main(String%5B%5D args) %7B%0A%09%09%0A%09%7D%0A%7D%0A

add leetcode 783