add: 220306-CN [cpp]

cpp/2203/220306-CN.cpp

@@ -0,0 +1,24 @@
+#include <vector>
+#include <iostream>
+
+class Solution {
+public:
+	static std::vector<int> goodDaysToRobBank(const std::vector<int>& security, int time) {
+		int n = security.size();
+		std::vector<int> ret, isNotIncreasingSince(n), isNotDecreasingSince(n);
+		for (int i = 1; i < n; ++i) {
+			isNotDecreasingSince[i] = (security[i - 1] <= security[i]) ? isNotDecreasingSince[i - 1] : i;
+			isNotIncreasingSince[i] = (security[i - 1] >= security[i]) ? isNotIncreasingSince[i - 1] : i;
+		}
+		for (int i = time; i < n - time; ++i)
+			if (isNotIncreasingSince[i] <= i - time && isNotDecreasingSince[i + time] <= i)
+				ret.push_back(i);
+		return ret;
+	}
+};
+
+int main() {
+	auto ret = Solution::goodDaysToRobBank({1,2,3,4,5,6},2);
+	for (int i : ret)
+		std::cout << i << ' ';
+}

cpp/2203/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2203)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2203 220305.cpp)
+ADD_EXECUTABLE(2203 220306-CN.cpp)