From f06d81c233d63a5539a37499de10bc97af87407f Mon Sep 17 00:00:00 2001
From: fw_qaq <82551626+Jack-Zhang-1314@users.noreply.github.com>
Date: Tue, 29 Nov 2022 12:48:10 +0800
Subject: [PATCH] =?UTF-8?q?Update=200530.=E4=BA=8C=E5=8F=89=E6=90=9C?=
 =?UTF-8?q?=E7=B4=A2=E6=A0=91=E7=9A=84=E6=9C=80=E5=B0=8F=E7=BB=9D=E5=AF=B9?=
 =?UTF-8?q?=E5=B7=AE.md?=
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---
 .../0530.二叉搜索树的最小绝对差.md | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/problems/0530.二叉搜索树的最小绝对差.md b/problems/0530.二叉搜索树的最小绝对差.md
index 984fefe5..8c47b633 100644
--- a/problems/0530.二叉搜索树的最小绝对差.md
+++ b/problems/0530.二叉搜索树的最小绝对差.md
@@ -576,6 +576,38 @@ impl Solution {
 }
 ```
 
+迭代
+
+```rust
+impl Solution {
+    pub fn get_minimum_difference(mut root: Option<Rc<RefCell<TreeNode>>>) -> i32 {
+        if root.is_none() {
+            return 0;
+        }
+        let mut stack = vec![];
+        let mut pre = -1;
+        let mut res = i32::MAX;
+        while root.is_some() || !stack.is_empty() {
+            while let Some(node) = root {
+                root = node.borrow().left.clone();
+                stack.push(node);
+            }
+
+            let node = stack.pop().unwrap();
+
+            if pre >= 0 {
+                res = res.min(node.borrow().val - pre);
+            }
+
+            pre = node.borrow().val;
+
+            root = node.borrow().right.clone();
+        }
+        res
+    }
+}
+```
+
 <p align="center">
 <a href="https://programmercarl.com/other/kstar.html" target="_blank">
   <img src="../pics/网站星球宣传海报.jpg" width="1000"/>