diff --git a/cpp/2203/220313.cpp b/cpp/2203/220313.cpp
new file mode 100644
index 0000000..f19f44b
--- /dev/null
+++ b/cpp/2203/220313.cpp
@@ -0,0 +1,34 @@
+#include <string>
+#include <stack>
+
+class Solution {
+public:
+	static bool isValid(const std::string& s) {
+		char pairs[256]{};
+		'}'[pairs] = '{';
+		']'[pairs] = '[';
+		')'[pairs] = '(';
+
+		std::stack<char> stack;
+		for (char c : s) {
+			switch (c) {
+				case '(':
+				case '[':
+				case '{':
+					stack.push(c);
+					break;
+				default:
+					if (stack.empty() || pairs[c] != stack.top())
+						return false;
+					stack.pop();
+			}
+		}
+
+		return stack.empty();
+	}
+};
+
+int main() {
+	int s[10];
+	5[s] = 111;
+}
diff --git a/cpp/2203/CMakeLists.txt b/cpp/2203/CMakeLists.txt
index 3accb46..cbdae08 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 220312.cpp)
+ADD_EXECUTABLE(2203 220313.cpp)