diff --git a/README.md b/README.md
index c7dd1df0e..75da74108 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,7 @@ leetcode 题解，记录自己的 leecode 解题之路。
 - [199.binary-tree-right-side-view](./problems/199.binary-tree-right-side-view.md)
 - [201.bitwise-and-of-numbers-range](./problems/201.bitwise-and-of-numbers-range.md)
 - [209.minimum-size-subarray-sum](./problems/209.minimum-size-subarray-sum.md)
+- [900.rle-iterator](./problems/900.rle-iterator)
 
 #### 困难难度
 
@@ -65,6 +66,7 @@ leetcode 题解，记录自己的 leecode 解题之路。
 - [basic-data-structure](./thinkings/basic-data-structure.md)（草稿）
 - [binary-tree-traversal](./thinkings/binary-tree-traversal.md)
 - [dynamic-programming](./thinkings/dynamic-programming.md)
+- [哈夫曼编码和游程编码](./thinkings/run-length-encode-and-huffman-encode.md)
 
 ### anki 卡片
 
@@ -76,8 +78,6 @@ TODO
 
 [609.find-duplicate-file-in-system]
 
-[哈夫曼编码和游程编码]
-
 [React hooks]
 
 [React fiber]
diff --git a/problems/900.rle-iterator.md b/problems/900.rle-iterator.md
index ec8ed8743..ee0dedfbd 100644
--- a/problems/900.rle-iterator.md
+++ b/problems/900.rle-iterator.md
@@ -174,5 +174,5 @@ RLEIterator.prototype.next = function(n) {
 
 ## 扩展阅读
 
-[run-length encode and huffman encode](../thinkings/run-length encode and huffman encode.md)
+[哈夫曼编码和游程编码](../thinkings/run-length-encode-and-huffman-encode.md)
 
diff --git a/thinkings/run-length encode and huffman encode.md b/thinkings/run-length-encode-and-huffman-encode.md
similarity index 100%
rename from thinkings/run-length encode and huffman encode.md
rename to thinkings/run-length-encode-and-huffman-encode.md