add: 220131-CN

2201/220131-CN.cpp

@@ -0,0 +1,17 @@
+#include <iostream>
+
+class Solution {
+public:
+	static constexpr int numberOfSteps(int num) {
+		int ret = 0;
+		for (; num & 0xFFFFFFFE; num >>= 1)
+			ret += 1 + (num & 1);
+		return ret + num;
+	}
+};
+
+int main() {
+	std::printf("%d\n", Solution::numberOfSteps(14));
+	std::printf("%d\n", Solution::numberOfSteps(8));
+	std::printf("%d\n", Solution::numberOfSteps(123));
+}

2201/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220130-CN.cpp)
+ADD_EXECUTABLE(2201 220131-CN.cpp)