diff --git a/problems/0059.螺旋矩阵II.md b/problems/0059.螺旋矩阵II.md
index 8823a0d8..ca2bcc26 100644
--- a/problems/0059.螺旋矩阵II.md
+++ b/problems/0059.螺旋矩阵II.md
@@ -87,11 +87,11 @@ public:
 
             // 下面开始的四个for就是模拟转了一圈
             // 模拟填充上行从左到右(左闭右开)
-            for (j = starty; j < n - offset; j++) {
-                res[startx][j] = count++;
+            for (j; j < n - offset; j++) {
+                res[i][j] = count++;
             }
             // 模拟填充右列从上到下(左闭右开)
-            for (i = startx; i < n - offset; i++) {
+            for (i; i < n - offset; i++) {
                 res[i][j] = count++;
             }
             // 模拟填充下行从右到左(左闭右开)
diff --git a/problems/0127.单词接龙.md b/problems/0127.单词接龙.md
index 97bc66d0..6f893310 100644
--- a/problems/0127.单词接龙.md
+++ b/problems/0127.单词接龙.md
@@ -198,7 +198,7 @@ class Solution {
 
 ### Python 
 
-```
+```python
 class Solution:
     def ladderLength(self, beginWord: str, endWord: str, wordList: List[str]) -> int:
         wordSet = set(wordList)
diff --git a/problems/0349.两个数组的交集.md b/problems/0349.两个数组的交集.md
index d3a1e12f..9902fff8 100644
--- a/problems/0349.两个数组的交集.md
+++ b/problems/0349.两个数组的交集.md
@@ -231,6 +231,8 @@ class Solution:
 
 ### Go：
 
+（版本一）使用字典和集合
+
 ```go
 func intersection(nums1 []int, nums2 []int) []int {
     set:=make(map[int]struct{},0)  // 用map模拟set
@@ -251,6 +253,28 @@ func intersection(nums1 []int, nums2 []int) []int {
 }
 ```
 
+（版本二）使用数组
+
+```go
+func intersection(nums1 []int, nums2 []int) []int {
+    count1 := make([]int, 1001, 1001)
+    count2 := make([]int, 1001, 1001)
+    res := make([]int, 0)
+    for _, v := range nums1 {
+        count1[v] = 1
+    }
+    for _, v := range nums2 {
+        count2[v] = 1
+    }
+    for i := 0; i <= 1000; i++ {
+        if count1[i] + count2[i] == 2 {
+            res = append(res, i)
+        }
+    }
+    return res
+}
+```
+
 ### JavaScript:
 
 ```js
diff --git a/problems/0496.下一个更大元素I.md b/problems/0496.下一个更大元素I.md
index 45797fb6..d97a3e84 100644
--- a/problems/0496.下一个更大元素I.md
+++ b/problems/0496.下一个更大元素I.md
@@ -256,6 +256,7 @@ class Solution {
 ### Python3
 
 ```python
+# 版本一
 class Solution:
     def nextGreaterElement(self, nums1: List[int], nums2: List[int]) -> List[int]:
         result = [-1]*len(nums1)
@@ -273,6 +274,26 @@ class Solution:
                     stack.pop()                 
                 stack.append(i)
         return result
+
+# 版本二
+class Solution:
+    def nextGreaterElement(self, nums1: List[int], nums2: List[int]) -> List[int]:
+        stack = []
+        # 创建答案数组
+        ans = [-1] * len(nums1)
+        for i in range(len(nums2)):
+            while len(stack) > 0 and nums2[i] > nums2[stack[-1]]:
+                # 判断 num1 是否有 nums2[stack[-1]]。如果没有这个判断会出现指针异常
+                if nums2[stack[-1]] in nums1:
+                    # 锁定 num1 检索的 index
+                    index = nums1.index(nums2[stack[-1]])
+                    # 更新答案数组
+                    ans[index] = nums2[i]
+                # 弹出小元素
+                # 这个代码一定要放在 if 外面。否则单调栈的逻辑就不成立了
+                stack.pop()
+            stack.append(i)
+        return ans
 ```
 
 ### Go
diff --git a/problems/0503.下一个更大元素II.md b/problems/0503.下一个更大元素II.md
index b788968c..6df83fb2 100644
--- a/problems/0503.下一个更大元素II.md
+++ b/problems/0503.下一个更大元素II.md
@@ -170,7 +170,6 @@ class Solution {
 ### Python: 
 
 ```python
-# 方法 1:
 class Solution:
     def nextGreaterElements(self, nums: List[int]) -> List[int]:
         dp = [-1] * len(nums)
@@ -181,26 +180,6 @@ class Solution:
                     stack.pop()
             stack.append(i%len(nums))
         return dp
-
-# 方法 2:
-class Solution:
-    def nextGreaterElement(self, nums1: List[int], nums2: List[int]) -> List[int]:
-        stack = []
-        # 创建答案数组
-        ans = [-1] * len(nums1)
-        for i in range(len(nums2)):
-            while len(stack) > 0 and nums2[i] > nums2[stack[-1]]:
-                # 判断 num1 是否有 nums2[stack[-1]]。如果没有这个判断会出现指针异常
-                if nums2[stack[-1]] in nums1:
-                    # 锁定 num1 检索的 index
-                    index = nums1.index(nums2[stack[-1]])
-                    # 更新答案数组
-                    ans[index] = nums2[i]
-                # 弹出小元素
-                # 这个代码一定要放在 if 外面。否则单调栈的逻辑就不成立了
-                stack.pop()
-            stack.append(i)
-        return ans
 ```
 ### Go: