Data commit

Task/Nonoblock/C-sharp/nonoblock.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Linq;
+using System.Text;
+
+public static class Nonoblock
+{
+    public static void Main() {
+        Positions(5, 2,1);
+        Positions(5);
+        Positions(10, 8);
+        Positions(15, 2,3,2,3);
+        Positions(5, 2,3);
+    }
+
+    public static void Positions(int cells, params int[] blocks) {
+        if (cells < 0 || blocks == null || blocks.Any(b => b < 1)) throw new ArgumentOutOfRangeException();
+        Console.WriteLine($"{cells} cells with [{string.Join(", ", blocks)}]");
+        if (blocks.Sum() + blocks.Length - 1 > cells) {
+            Console.WriteLine("No solution");
+            return;
+        }
+        var spaces = new int[blocks.Length + 1];
+        int total = -1;
+        for (int i = 0; i < blocks.Length; i++) {
+            total += blocks[i] + 1;
+            spaces[i+1] = total;
+        }
+        spaces[spaces.Length - 1] = cells - 1;
+        var sb = new StringBuilder(string.Join(".", blocks.Select(b => new string('#', b))).PadRight(cells, '.'));
+        Iterate(sb, spaces, spaces.Length - 1, 0);
+        Console.WriteLine();
+    }
+
+    private static void Iterate(StringBuilder output, int[] spaces, int index, int offset) {
+        Console.WriteLine(output.ToString());
+        if (index <= 0) return;
+        int count = 0;
+        while (output[spaces[index] - offset] != '#') {
+            count++;
+            output.Remove(spaces[index], 1);
+            output.Insert(spaces[index-1], '.');
+            spaces[index-1]++;
+            Iterate(output, spaces, index - 1, 1);
+        }
+        if (offset == 0) return;
+        spaces[index-1] -= count;
+        output.Remove(spaces[index-1], count);
+        output.Insert(spaces[index] - count, ".", count);
+    }
+
+}