diff --git a/cpp/2205/220527.cpp b/cpp/2205/220527.cpp
new file mode 100644
index 0000000..eefcf7a
--- /dev/null
+++ b/cpp/2205/220527.cpp
@@ -0,0 +1,22 @@
+#include <cstdio>
+
+/**
+ * 1342. Number of Steps to Reduce a Number to Zero
+ * Given an integer num, return the number of steps to reduce it to zero.
+ * In one step, if the current number is even, you have to divide it by 2, otherwise, you have to subtract 1 from it.
+ *
+ * Refer: 220131-CN.cpp
+ * __builtin functions this time.
+ */
+
+class Solution {
+public:
+	static int numberOfSteps(int num) {
+		return num ? 31 - __builtin_clz(num) + __builtin_popcount(num) : 0;
+	}
+};
+
+int main() {
+	std::printf("%d\n", Solution::numberOfSteps(14));
+	return 0;
+}
diff --git a/cpp/2205/CMakeLists.txt b/cpp/2205/CMakeLists.txt
index 2a5d483..6fafc44 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 220527-CN.cpp)
+ADD_EXECUTABLE(2205 220527.cpp)