add: 230301-CN

cpp/2303/230301-CN.cpp

@@ -0,0 +1,28 @@
+#include <vector>
+
+/**
+ * 2373. Largest Local Values in a Matrix
+ *
+ * You are given an n x n integer matrix grid.
+ *
+ * Generate an integer matrix maxLocal of size (n - 2) x (n - 2) such that:
+ *
+ * maxLocal[i][j] is equal to the largest value of the 3 x 3 matrix in grid centered around row i + 1 and column j + 1.
+ * In other words, we want to find the largest value in every contiguous 3 x 3 matrix in grid.
+ *
+ * Return the generated matrix.
+ */
+
+class Solution {
+public:
+	static std::vector<std::vector<int>> largestLocal(const std::vector<std::vector<int>>& grid) {
+		const int n = grid.size(), t = n - 2;
+		auto ret = std::vector<std::vector<int>>(t, std::vector<int>(t));
+		for (int i = 0; i < t; ++i)
+			for (int j = 0; j < t; ++j)
+				for (int k = 0; k < 3; ++k)
+					for (int l = 0; l < 3; ++l)
+						ret[i][j] = std::max(ret[i][j], grid[i + k][j + l]);
+		return ret;
+	}
+};

cpp/2303/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2303)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2303 230301.cpp)
+ADD_EXECUTABLE(2303 230301-CN.cpp)