Merge branch 'main' into swift

# Conflicts:
#	animation-simulation/数组篇/leetcode219数组中重复元素2.md
#	animation-simulation/数组篇/leetcode59螺旋矩阵2.md
#	animation-simulation/数组篇/leetcode66加一.md
#	animation-simulation/数组篇/leetcode75颜色分类.md

animation-simulation/数组篇/leetcode219数组中重复元素2.md

@@ -78,6 +78,22 @@ class Solution:
         return False
 ```
 
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    bool containsNearbyDuplicate(vector<int>& nums, int k) {
+        unordered_map <int, int> m;
+        for(int i = 0; i < nums.size(); ++i){
+            if(m.count(nums[i]) && i - m[nums[i]] <= k) return true;
+            m[nums[i]] = i;
+        }
+        return false;
+    }
+};
+```
+
 Swift Code
 
 ```swift
@@ -165,7 +181,24 @@ class Solution:
             if len(s) > k:
                 s.remove(nums[i - k])
         return False
-```        
+```
+
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    bool containsNearbyDuplicate(vector<int>& nums, int k) {
+        multiset <int> S;
+        for(int i = 0; i < nums.size(); ++i){
+            if(S.count(nums[i])) return true;
+            S.insert(nums[i]);
+            if(S.size() > k) S.erase(nums[i - k]);
+        }
+        return false;
+    }
+};
+```
 
 Swift Code
 
@@ -190,4 +223,4 @@ class Solution {
         return false
     }
 }
-```
+```