diff --git a/cpp/2203/220315-CN.cpp b/cpp/2203/220315-CN.cpp
new file mode 100644
index 0000000..ae12a3e
--- /dev/null
+++ b/cpp/2203/220315-CN.cpp
@@ -0,0 +1,18 @@
+#include <vector>
+
+class Solution {
+public:
+	static int countMaxOrSubsets(const std::vector<int>& nums) {
+		int maxOr = 0;
+		for (int i : nums)
+			maxOr |= i;
+		int n = nums.size(), LIM = 1 << n, ret = 0;
+		for (int i = 1; i < LIM; ++i) {
+			int ans = 0;
+			for (int j = 0; j < n; ++j)
+				ans |= ((1 << j) & i) ? nums[j] : 0;
+			ret += ans == maxOr;
+		}
+		return ret;
+	}
+};
diff --git a/cpp/2203/CMakeLists.txt b/cpp/2203/CMakeLists.txt
index 3850239..9c7cc24 100644
--- a/cpp/2203/CMakeLists.txt
+++ b/cpp/2203/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2203)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2203 220314-CN.cpp)
+ADD_EXECUTABLE(2203 220315-CN.cpp)