Time: 0 ms (100.00%) | Memory: 15 MB (53.49%) - LeetSync

Author: achuatchaya

1677-matrix-diagonal-sum/matrix-diagonal-sum.cpp

@@ -0,0 +1,20 @@
+class Solution {
+public:
+    int diagonalSum(vector<vector<int>>& mat) {
+        int n = mat.size();
+        int sum = 0;
+
+        for (int i = 0; i < n; i++) {
+            
+            sum = sum+ mat[i][i];
+
+        int m =  n - 1 - i;
+            if (i != m) {
+                sum += mat[i][m];
+            }
+        }
+
+        return sum;
+    }
+};
+