diff --git a/2201/220121.cpp b/2201/220121.cpp
new file mode 100644
index 0000000..241c7a7
--- /dev/null
+++ b/2201/220121.cpp
@@ -0,0 +1,23 @@
+#include <vector>
+#include <iostream>
+
+class Solution {
+public:
+	static int canCompleteCircuit(const std::vector<int>& gas, const std::vector<int>& cost) {
+		int n = gas.size(), min = 0x7FFFFFFF, minPos = -1, sum = 0;
+		for (int i = 0; i < n; ++i) {
+			if ((sum += gas[i] - cost[i]) < min) {
+				min = sum;
+				minPos = i;
+			}
+		}
+		if (sum < 0)
+			return -1;
+		return (minPos + 1) % n;
+	}
+};
+
+int main() {
+	std::cout << Solution::canCompleteCircuit({2,3,4}, {3,4,3});
+	return 0;
+}
diff --git a/2201/CMakeLists.txt b/2201/CMakeLists.txt
index 487d554..c1873c4 100644
--- a/2201/CMakeLists.txt
+++ b/2201/CMakeLists.txt
@@ -3,4 +3,4 @@ PROJECT(2201)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2201 220120-CN.cpp)
+ADD_EXECUTABLE(2201 220121.cpp)