diff --git a/cpp/2205/220509-CN.cpp b/cpp/2205/220509-CN.cpp
new file mode 100644
index 0000000..12746b3
--- /dev/null
+++ b/cpp/2205/220509-CN.cpp
@@ -0,0 +1,35 @@
+#include <vector>
+#include <string>
+#include <iostream>
+
+/**
+ * 942. DI String MatchA permutation perm of n + 1 integers of all the integers in the range [0, n] can be represented as a string s of length n where:
+ *
+ * s[i] == 'I' if perm[i] < perm[i + 1], and
+ * s[i] == 'D' if perm[i] > perm[i + 1].
+ * Given a string s, reconstruct the permutation perm and return it. If there are multiple valid permutations perm, return any of them.
+ *
+ */
+
+class Solution {
+public:
+    static std::vector<int> diStringMatch(const std::string& s) {
+		int p = 1, n = -1;
+		std::vector<int> ret;
+		ret.reserve(s.length() + 1);
+		ret.push_back(0);
+		for (char c : s)
+			ret.push_back(c == 'I' ? p++ : n--);
+		n = (-n) - 1;
+		for (int& i : ret)
+			i += n;
+		return ret;
+    }
+};
+
+int main() {
+	auto r = Solution::diStringMatch("DDI");
+	for (const auto& i : r)
+		std::cout << i << ' ';
+	return 0;
+}
diff --git a/cpp/2205/CMakeLists.txt b/cpp/2205/CMakeLists.txt
index 6be1653..293aad9 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 220508-CN.cpp)
+ADD_EXECUTABLE(2205 220509-CN.cpp)