diff --git a/cpp/2202/220223-CN.cpp b/cpp/2202/220223-CN.cpp
new file mode 100644
index 0000000..4cee65e
--- /dev/null
+++ b/cpp/2202/220223-CN.cpp
@@ -0,0 +1,25 @@
+#include <string>
+#include <cctype>
+#include <iostream>
+
+class Solution {
+public:
+	static std::string reverseOnlyLetters(std::string s) {
+		int L = 0, R = s.length() - 1;
+		for (; L < R && !std::isalpha(s[L]); ++L);
+		for (; R && !std::isalpha(s[R]); --R);
+		for (; L < R; ++L, --R) {
+			for (; L < R && !std::isalpha(s[L]); ++L);
+			for (; R && !std::isalpha(s[R]); --R);
+			if (L >= R)
+				break;
+			std::swap(s[L], s[R]);
+		}
+		return s;
+	}
+};
+
+int main() {
+	std::cout << Solution::reverseOnlyLetters("-");
+	return 0;
+}
diff --git a/cpp/2202/CMakeLists.txt b/cpp/2202/CMakeLists.txt
index 48623dc..7139825 100644
--- a/cpp/2202/CMakeLists.txt
+++ b/cpp/2202/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2202)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2202 220222.cpp)
+ADD_EXECUTABLE(2202 220223-CN.cpp)