diff --git a/2201/220110.cpp b/2201/220110.cpp
new file mode 100644
index 0000000..0fed99e
--- /dev/null
+++ b/2201/220110.cpp
@@ -0,0 +1,25 @@
+#include <string>
+#include <iostream>
+#include <random>
+
+class Solution {
+public:
+	static std::string addBinary(const std::string& a, const std::string& b) {
+		char* const ret = new char[std::max(a.length(), b.length()) + 2]{};
+		int cin = 0;
+		for (int pos = std::max(a.length(), b.length()), posA = a.length() - 1, posB = b.length() - 1; posA >= 0 || posB >= 0; --posA, --posB, --pos) {
+			ret[pos] = (((posA < 0 ? 0 : (a[posA] ^ 48)) + (posB < 0 ? 0 : (b[posB] ^ 48)) + cin) & 1) ^ 48;
+			cin = ((posA < 0 ? 0 : (a[posA] ^ 48)) + (posB < 0 ? 0 : (b[posB] ^ 48)) + cin) >> 1;
+		}
+		if (cin)
+			*ret = '1';
+		std::string r(*ret ? ret : (ret + 1));
+		delete[] ret;
+		return r;
+	}
+};
+
+int main() {
+	std::cout << Solution::addBinary("0", "1");
+	return 0;
+}
diff --git a/2201/CMakeLists.txt b/2201/CMakeLists.txt
index 278f84f..e510b1f 100644
--- a/2201/CMakeLists.txt
+++ b/2201/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220110-CN.cpp)
\ No newline at end of file
+ADD_EXECUTABLE(2201 220110.cpp)
\ No newline at end of file