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/leetcode66加一.md

@@ -3,7 +3,6 @@
 > 感谢支持，该仓库会一直维护，希望对各位有一丢丢帮助。
 >
 > 另外希望手机阅读的同学可以来我的 <u>[**公众号：袁厨的算法小屋**](https://raw.githubusercontent.com/tan45du/test/master/微信图片_20210320152235.2pthdebvh1c0.png)</u> 两个平台同步，想要和题友一起刷题，互相监督的同学，可以在我的小屋点击<u>[**刷题小队**](https://raw.githubusercontent.com/tan45du/test/master/微信图片_20210320152235.2pthdebvh1c0.png)</u>进入。 
->
 
 #### [66. 加一](https://leetcode-cn.com/problems/plus-one/)
 
@@ -86,6 +85,24 @@ class Solution:
         return arr
 ```
 
+C++ Code:
+
+```cpp
+class Solution {
+public:
+    vector<int> plusOne(vector<int>& digits) {
+        for(int i = digits.size() - 1; i >= 0; --i){
+            digits[i] = (digits[i] + 1)%10;
+            if(digits[i]) return digits;
+        }
+        for(int & x: digits) x = 0;
+        digits.emplace_back(1);
+        reverse(digits.begin(), digits.end());
+        return digits;
+    }
+};
+```
+
 Swift Code:
 
 ```swift
@@ -105,3 +122,4 @@ class Solution {
     }
 }
 ```
+