init

23/08/Q1572.cpp

@@ -0,0 +1,17 @@
+#include <vector>
+
+using namespace std;
+
+class Q1572 {
+public:
+    int diagonalSum_1(vector<vector<int>> &mat) {
+        int sum = 0;
+        for (int i = 0; i < mat.size(); ++i) {
+            sum += mat[i][i] + mat[i][mat.size() - i - 1];
+        }
+        if ((mat.size() & 1) == 1) {
+            sum -= mat[mat.size() / 2][mat.size() / 2];
+        }
+        return sum;
+    }
+};