Data update

Task/Cut-a-rectangle/C-sharp/cut-a-rectangle.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+
+public class CutRectangle
+{
+    private static int[][] dirs = new int[][] { new int[] { 0, -1 }, new int[] { -1, 0 }, new int[] { 0, 1 }, new int[] { 1, 0 } };
+
+    public static void Main(string[] args)
+    {
+        CutRectangleMethod(2, 2);
+        CutRectangleMethod(4, 3);
+    }
+
+    static void CutRectangleMethod(int w, int h)
+    {
+        if (w % 2 == 1 && h % 2 == 1)
+            return;
+
+        int[,] grid = new int[h, w];
+        Stack<int> stack = new Stack<int>();
+
+        int half = (w * h) / 2;
+        long bits = (long)Math.Pow(2, half) - 1;
+
+        for (; bits > 0; bits -= 2)
+        {
+            for (int i = 0; i < half; i++)
+            {
+                int r = i / w;
+                int c = i % w;
+                grid[r, c] = (bits & (1L << i)) != 0 ? 1 : 0;
+                grid[h - r - 1, w - c - 1] = 1 - grid[r, c];
+            }
+
+            stack.Push(0);
+            grid[0, 0] = 2;
+            int count = 1;
+            while (stack.Count > 0)
+            {
+                int pos = stack.Pop();
+                int r = pos / w;
+                int c = pos % w;
+
+                foreach (var dir in dirs)
+                {
+                    int nextR = r + dir[0];
+                    int nextC = c + dir[1];
+
+                    if (nextR >= 0 && nextR < h && nextC >= 0 && nextC < w)
+                    {
+                        if (grid[nextR, nextC] == 1)
+                        {
+                            stack.Push(nextR * w + nextC);
+                            grid[nextR, nextC] = 2;
+                            count++;
+                        }
+                    }
+                }
+            }
+            if (count == half)
+            {
+                PrintResult(grid, h, w);
+            }
+        }
+    }
+
+    static void PrintResult(int[,] arr, int height, int width)
+    {
+        for (int i = 0; i < height; i++)
+        {
+            for (int j = 0; j < width; j++)
+            {
+                Console.Write(arr[i, j] + (j == width - 1 ? "" : ", "));
+            }
+            Console.WriteLine();
+        }
+        Console.WriteLine();
+    }
+}