diff --git a/README.md b/README.md
index fa241aa..f7ca3c7 100644
--- a/README.md
+++ b/README.md
@@ -9,34 +9,34 @@
 
 # 索引
 * [.](.)
-        * [notes](./notes)
-            * [alg-general.md](./notes/alg-general.md)
-            * [hashTable.md](./notes/hashTable.md)
-            * [README.md](./notes/README.md)
-            * [sort.md](./notes/sort.md)
-            * [tree.md](./notes/tree.md)
-        * [algorithm](./algorithm)
-            * [8Astar.py](./algorithm/8Astar.py)
-            * [cantor.cc](./algorithm/cantor.cc)
-            * [EIGHT.py](./algorithm/EIGHT.py)
-            * [manacher.py](./algorithm/manacher.py)
-            * [markov.py](./algorithm/markov.py)
-            * [README.md](./algorithm/README.md)
-            * [sort](./algorithm/sort)
-            * [sunday.py](./algorithm/sunday.py)
-        * [dataStructure](./dataStructure)
-            * [allOone](./dataStructure/allOone)
-            * [binaryHeap.py](./dataStructure/binaryHeap.py)
-            * [binaryIndexedTree.cc](./dataStructure/binaryIndexedTree.cc)
-            * [binaryTree.py](./dataStructure/binaryTree.py)
-            * [hashTable.py](./dataStructure/hashTable.py)
-            * [huffman.cc](./dataStructure/huffman.cc)
-            * [leftHeap.py](./dataStructure/leftHeap.py)
-            * [loserTree.py](./dataStructure/loserTree.py)
-            * [map](./dataStructure/map)
-            * [README.md](./dataStructure/README.md)
-            * [segTree.cc](./dataStructure/segTree.cc)
-            * [splayTree.py](./dataStructure/splayTree.py)
-            * [stack](./dataStructure/stack)
-            * [trie.py](./dataStructure/trie.py)
-            * [winnerTree.py](./dataStructure/winnerTree.py)
+    * [notes](./notes)
+        * [alg-general.md](./notes/alg-general.md)
+        * [hashTable.md](./notes/hashTable.md)
+        * [README.md](./notes/README.md)
+        * [sort.md](./notes/sort.md)
+        * [tree.md](./notes/tree.md)
+    * [algorithm](./algorithm)
+        * [8Astar.py](./algorithm/8Astar.py)
+        * [cantor.cc](./algorithm/cantor.cc)
+        * [EIGHT.py](./algorithm/EIGHT.py)
+        * [manacher.py](./algorithm/manacher.py)
+        * [markov.py](./algorithm/markov.py)
+        * [README.md](./algorithm/README.md)
+        * [sort](./algorithm/sort)
+        * [sunday.py](./algorithm/sunday.py)
+    * [dataStructure](./dataStructure)
+        * [allOone](./dataStructure/allOone)
+        * [binaryHeap.py](./dataStructure/binaryHeap.py)
+        * [binaryIndexedTree.cc](./dataStructure/binaryIndexedTree.cc)
+        * [binaryTree.py](./dataStructure/binaryTree.py)
+        * [hashTable.py](./dataStructure/hashTable.py)
+        * [huffman.cc](./dataStructure/huffman.cc)
+        * [leftHeap.py](./dataStructure/leftHeap.py)
+        * [loserTree.py](./dataStructure/loserTree.py)
+        * [map](./dataStructure/map)
+        * [README.md](./dataStructure/README.md)
+        * [segTree.cc](./dataStructure/segTree.cc)
+        * [splayTree.py](./dataStructure/splayTree.py)
+        * [stack](./dataStructure/stack)
+        * [trie.py](./dataStructure/trie.py)
+        * [winnerTree.py](./dataStructure/winnerTree.py)