diff --git a/2202/220210-CN.cpp b/2202/220210-CN.cpp
new file mode 100644
index 0000000..b64aca6
--- /dev/null
+++ b/2202/220210-CN.cpp
@@ -0,0 +1,19 @@
+#include <vector>
+#include <string>
+#include <numeric>
+
+class Solution {
+private:
+	inline static std::string genStr(int x, int y) {
+		return std::to_string(x) + "/" + std::to_string(y);
+	}
+public:
+	static std::vector<std::string> simplifiedFractions(int n) {
+		std::vector<std::string> ret;
+		for (int i = 2; i < n; ++i)
+			for (int j = 1; j < i; ++j)
+				if (1 == std::gcd(i, j))
+					ret.push_back(genStr(j, i));
+		return ret;
+	}
+};
\ No newline at end of file
diff --git a/2202/CMakeLists.txt b/2202/CMakeLists.txt
index 8f76748..4250bd9 100644
--- a/2202/CMakeLists.txt
+++ b/2202/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2202)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2202 220209-CN.cpp)
+ADD_EXECUTABLE(2202 220210-CN.cpp)