feat: add swift implementation to lcci problem: No.03.06 (doocs#2644)

Author: klever34

lcci/03.06.Animal Shelter/README.md

@@ -316,6 +316,43 @@ impl AnimalShelf {
  */
 ```
 
+```swift
+class AnimalShelf {
+    private var q: [[Int]] = Array(repeating: [], count: 2)
+
+    init() {
+    }
+
+    func enqueue(_ animal: [Int]) {
+        q[animal[1]].append(animal[0])
+    }
+
+    func dequeueAny() -> [Int] {
+        if q[0].isEmpty || (!q[1].isEmpty && q[1].first! < q[0].first!) {
+            return dequeueDog()
+        }
+        return dequeueCat()
+    }
+
+    func dequeueDog() -> [Int] {
+        return q[1].isEmpty ? [-1, -1] : [q[1].removeFirst(), 1]
+    }
+
+    func dequeueCat() -> [Int] {
+        return q[0].isEmpty ? [-1, -1] : [q[0].removeFirst(), 0]
+    }
+}
+
+/**
+ * Your AnimalShelf object will be instantiated and called as such:
+ * let obj = new AnimalShelf();
+ * obj.enqueue(animal);
+ * let param_2 = obj.dequeueAny();
+ * let param_3 = obj.dequeueDog();
+ * let param_4 = obj.dequeueCat();
+ */
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

lcci/03.06.Animal Shelter/README_EN.md

@@ -329,6 +329,43 @@ impl AnimalShelf {
  */
 ```
 
+```swift
+class AnimalShelf {
+    private var q: [[Int]] = Array(repeating: [], count: 2)
+
+    init() {
+    }
+
+    func enqueue(_ animal: [Int]) {
+        q[animal[1]].append(animal[0])
+    }
+
+    func dequeueAny() -> [Int] {
+        if q[0].isEmpty || (!q[1].isEmpty && q[1].first! < q[0].first!) {
+            return dequeueDog()
+        }
+        return dequeueCat()
+    }
+
+    func dequeueDog() -> [Int] {
+        return q[1].isEmpty ? [-1, -1] : [q[1].removeFirst(), 1]
+    }
+
+    func dequeueCat() -> [Int] {
+        return q[0].isEmpty ? [-1, -1] : [q[0].removeFirst(), 0]
+    }
+}
+
+/**
+ * Your AnimalShelf object will be instantiated and called as such:
+ * let obj = new AnimalShelf();
+ * obj.enqueue(animal);
+ * let param_2 = obj.dequeueAny();
+ * let param_3 = obj.dequeueDog();
+ * let param_4 = obj.dequeueCat();
+ */
+```
+
 <!-- tabs:end -->
 
 <!-- end -->

lcci/03.06.Animal Shelter/Solution.swift

@@ -0,0 +1,35 @@
+class AnimalShelf {
+    private var q: [[Int]] = Array(repeating: [], count: 2)
+
+    init() {
+    }
+
+    func enqueue(_ animal: [Int]) {
+        q[animal[1]].append(animal[0])
+    }
+
+    func dequeueAny() -> [Int] {
+        if q[0].isEmpty || (!q[1].isEmpty && q[1].first! < q[0].first!) {
+            return dequeueDog()
+        }
+        return dequeueCat()
+    }
+
+    func dequeueDog() -> [Int] {
+        return q[1].isEmpty ? [-1, -1] : [q[1].removeFirst(), 1]
+    }
+
+    func dequeueCat() -> [Int] {
+        return q[0].isEmpty ? [-1, -1] : [q[0].removeFirst(), 0]
+    }
+}
+
+/**
+ * Your AnimalShelf object will be instantiated and called as such:
+ * let obj = new AnimalShelf();
+ * obj.enqueue(animal);
+ * let param_2 = obj.dequeueAny();
+ * let param_3 = obj.dequeueDog();
+ * let param_4 = obj.dequeueCat();
+ */
+