diff --git a/2201/220102.cpp b/2201/220102.cpp
new file mode 100644
index 0000000..7a775ba
--- /dev/null
+++ b/2201/220102.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+#include <vector>
+
+class Solution {
+public:
+	static int numPairsDivisibleBy60(const std::vector<int>& time) {
+		int bucket[61]{0};
+		for (const auto& i : time)
+			++bucket[i % 60];
+		int ret = bucket[0] * (bucket[0] - 1) / 2 + bucket[30] * (bucket[30] - 1) / 2;
+		for (int i = 1; i < 30; ++i)
+			ret += bucket[i] * bucket[60 - i];
+		return ret;
+	}
+};
+
+int main() {
+	std::cout << Solution::numPairsDivisibleBy60({60,60,60});
+	return 0;
+}
diff --git a/2201/CMakeLists.txt b/2201/CMakeLists.txt
index 20e68cc..01825ae 100644
--- a/2201/CMakeLists.txt
+++ b/2201/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220102-CN.cpp)
\ No newline at end of file
+ADD_EXECUTABLE(2201 220102.cpp)
\ No newline at end of file