Create 661. Image Smoother

661. Image Smoother

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+class Solution {
+public:
+    vector<vector<int>> imageSmoother(vector<vector<int>>& img) {
+        ios_base::sync_with_stdio(false);
+        cin.tie(0);
+        cout.tie(0);
+        // code
+        int m = img.size(), n = img[0].size();
+        vector<vector<int>> result(m, vector<int>(n));
+
+        for (int r = 0; r < m; r++) 
+        {
+            for (int c = 0; c < n; c++) 
+            {
+                int sum = 0, count = 0;
+
+                // Iterate over the 3x3 neighborhood
+                for (int dr = -1; dr <= 1; dr++) 
+                {
+                    for (int dc = -1; dc <= 1; dc++) 
+                    {
+                        int nr = r + dr;
+                        int nc = c + dc;
+
+                        // Check if the neighbor is within bounds
+                        if ((nr >= 0) && (nr < m) && (nc >= 0) && (nc < n)) 
+                        {
+                            sum += img[nr][nc];
+                            count++;
+                        }
+                    }
+                }
+
+                // Calculate the average and update the result matrix
+                result[r][c] = (sum / count);
+            }
+        }
+
+        return result;
+    }
+};