Merge pull request #2098 from kabirdhillon7/380Swift

Created 0380-Insert-Delete-GetRandom-O(1).Swift

Author: saip7795

swift/0380-Insert-Delete-GetRandom-O(1).Swift

@@ -0,0 +1,37 @@
+class RandomizedSet {
+    var random = Set<Int>()
+
+    init() {
+    
+    }
+    
+    func insert(_ val: Int) -> Bool {
+        if !random.contains(val){
+            random.insert(val)
+            return true
+        } else {
+            return false
+        }
+    }
+    
+    func remove(_ val: Int) -> Bool {
+        if random.contains(val) {
+            random.remove(val)
+            return true
+        } else {
+            return false
+        }
+    }
+    
+    func getRandom() -> Int {
+        return random.randomElement()!
+    }
+}
+
+/**
+ * Your RandomizedSet object will be instantiated and called as such:
+ * let obj = RandomizedSet()
+ * let ret_1: Bool = obj.insert(val)
+ * let ret_2: Bool = obj.remove(val)
+ * let ret_3: Int = obj.getRandom()
+ */