Data commit

Task/Nonoblock/Swift/nonoblock.swift

@@ -0,0 +1,52 @@
+import Foundation
+
+func nonoblock(cells: Int, blocks: [Int]) {
+    print("\(cells) cells and blocks \(blocks):")
+    let totalBlockSize = blocks.reduce(0, +)
+    if cells < totalBlockSize + blocks.count - 1 {
+        print("no solution")
+        return
+    }
+
+    func solve(cells: Int, index: Int, totalBlockSize: Int, offset: Int) {
+        if index == blocks.count {
+            count += 1
+            print("\(String(format: "%2d", count))  \(String(output))")
+            return
+        }
+        let blockSize = blocks[index]
+        let maxPos = cells - (totalBlockSize + blocks.count - index - 1)
+        let t = totalBlockSize - blockSize
+        var c = cells - (blockSize + 1)
+        for pos in 0...maxPos {
+            fill(value: ".", offset: offset, count: maxPos + blockSize)
+            fill(value: "#", offset: offset + pos, count: blockSize)
+            solve(cells: c, index: index + 1, totalBlockSize: t,
+                  offset: offset + blockSize + pos + 1)
+            c -= 1
+        }
+    }
+
+    func fill(value: Character, offset: Int, count: Int) {
+        output.replaceSubrange(offset..<offset+count,
+                               with: repeatElement(value, count: count))
+    }
+
+    var output: [Character] = Array(repeating: ".", count: cells)
+    var count = 0
+    solve(cells: cells, index: 0, totalBlockSize: totalBlockSize, offset: 0)
+}
+
+nonoblock(cells: 5, blocks: [2, 1])
+print()
+
+nonoblock(cells: 5, blocks: [])
+print()
+
+nonoblock(cells: 10, blocks: [8])
+print()
+
+nonoblock(cells: 15, blocks: [2, 3, 2, 3])
+print()
+
+nonoblock(cells: 5, blocks: [2, 3])