diff --git a/cpp/2205/220517-CN.cpp b/cpp/2205/220517-CN.cpp
index 81b1a82..95c50f2 100644
--- a/cpp/2205/220517-CN.cpp
+++ b/cpp/2205/220517-CN.cpp
@@ -2,6 +2,12 @@
 #include <string>
 #include <cstdio>
 
+/**
+ * 953. Verifying an Alien Dictionary
+ * In an alien language, surprisingly, they also use English lowercase letters, but possibly in a different order. The order of the alphabet is some permutation of lowercase letters.
+ * Given a sequence of words written in the alien language, and the order of the alphabet, return true if and only if the given words are sorted lexicographically in this alien language.
+ */
+
 class Solution {
 public:
     static bool isAlienSorted(const std::vector<std::string>& words, const std::string& order) {
diff --git a/cpp/2205/220517.cpp b/cpp/2205/220517.cpp
new file mode 100644
index 0000000..2bcecb2
--- /dev/null
+++ b/cpp/2205/220517.cpp
@@ -0,0 +1,30 @@
+struct TreeNode {
+    int val;
+    TreeNode* left;
+    TreeNode* right;
+
+    explicit TreeNode(int x = 0, TreeNode* l = nullptr, TreeNode* r = nullptr) : val(x), left(l), right(r) {}
+};
+
+/**
+ * 1379. Find a Corresponding Node of a Binary Tree in a Clone of That Tree
+ * Given two binary trees original and cloned and given a reference to a node target in the original tree.
+ * The cloned tree is a copy of the original tree.
+ * Return a reference to the same node in the cloned tree.
+ * Note that you are not allowed to change any of the two trees or the target node and the answer must be a reference to a node in the cloned tree.
+ */
+
+class Solution {
+private:
+    template<typename T>
+    static T* notNull(T* p1, T* p2) {
+		return p1 ? p1 : p2;
+	}
+
+public:
+    static TreeNode* getTargetCopy(TreeNode* original, TreeNode* cloned, TreeNode* target) {
+		if (!original || !cloned || !target)
+			return nullptr;
+		return original == target ? cloned : notNull(getTargetCopy(original->left, cloned->left, target), getTargetCopy(original->right, cloned->right, target));
+	}
+};
\ No newline at end of file
diff --git a/cpp/2205/CMakeLists.txt b/cpp/2205/CMakeLists.txt
index 070d48d..730f500 100644
--- a/cpp/2205/CMakeLists.txt
+++ b/cpp/2205/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2205)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2205 220517-CN.cpp)
+ADD_EXECUTABLE(2205 220517-CN.cpp 220517.cpp)