diff --git a/problems/0131.分割回文串.md b/problems/0131.分割回文串.md
index 0081223c..070b5182 100644
--- a/problems/0131.分割回文串.md
+++ b/problems/0131.分割回文串.md
@@ -488,15 +488,15 @@ var partition = function(s) {
     const res = [], path = [], len = s.length;
     backtracking(0);
     return res;
-    function backtracking(i) {
-        if(i >= len) {
+    function backtracking(startIndex) {
+        if(startIndex >= len) {
             res.push(Array.from(path));
             return;
         }
-        for(let j = i; j < len; j++) {
-            if(!isPalindrome(s, i, j)) continue;
-            path.push(s.slice(i, j + 1));
-            backtracking(j + 1);
+        for(let i = startIndex; i < len; i++) {
+            if(!isPalindrome(s, startIndex, i)) continue;
+            path.push(s.slice(startIndex, i + 1));
+            backtracking(i + 1);
             path.pop();
         }
     }
diff --git a/problems/0491.递增子序列.md b/problems/0491.递增子序列.md
index c0196973..c764a1c3 100644
--- a/problems/0491.递增子序列.md
+++ b/problems/0491.递增子序列.md
@@ -399,7 +399,7 @@ var findSubsequences = function(nums) {
 
 ```
 
-## TypeScript
+### TypeScript
 
 ```typescript
 function findSubsequences(nums: number[]): number[][] {
@@ -545,7 +545,7 @@ int** findSubsequences(int* nums, int numsSize, int* returnSize, int** returnCol
 }
 ```
 
-## Swift
+### Swift
 
 ```swift
 func findSubsequences(_ nums: [Int]) -> [[Int]] {
@@ -576,7 +576,7 @@ func findSubsequences(_ nums: [Int]) -> [[Int]] {
 ```
 
 
-## Scala
+### Scala
 
 ```scala
 object Solution {