Added Swift sample

ACC.swift

@@ -0,0 +1,32 @@
+import Foundation
+
+protocol __{};extension String:__{};extension Int:__{};extension Int64:__{};extension Double:__{}
+class InputScanner {  //based on https://github.com/shoumikhin/StreamScanner
+  let source = FileHandle.standardInput
+  let delimiters = CharacterSet.whitespacesAndNewlines
+  var buffer: Scanner?
+  func read<T: __>() -> T? {
+    if buffer?.isAtEnd ?? true {
+      if let nextInput = String(data: source.availableData, encoding: .utf8) {
+        buffer = Scanner(string: nextInput) }}
+    if buffer == nil { return nil }
+    var token: NSString?
+    guard buffer?.scanUpToCharacters(from: delimiters, into: &token) ?? false,
+      let string = token as? String else { return nil }
+    buffer?.scanCharacters(from: delimiters, into: nil)
+    let scanner = Scanner(string: string)
+    switch T.self {
+    case is String.Type: return token as? T
+    case is Int.Type : var value: Int = 0; if scanner.scanInt(&value) { return value as? T }
+    case is Int64.Type : var value: Int64 = 0; if scanner.scanInt64(&value) { return value as? T }
+    case is Double.Type : var value: Double = 0; if scanner.scanDouble(&value) { return value as? T }
+    default : break }
+    return nil }}
+let io = InputScanner()
+
+if
+    let a: Int = io.read(),
+    let b: Int = io.read()
+{
+    print("\(a + b)\n\(a * b)")
+}