Add workspace

Utils/Utils.swift

@@ -0,0 +1,38 @@
+import Foundation
+
+extension Scanner {
+    @discardableResult
+    func string(_ string: String) -> Bool {
+        return scanString(string) != nil
+    }
+
+    func integers() -> [Int] {
+        var numbers: [Int] = []
+        while let num = scanInt() {
+            numbers.append(num)
+        }
+        return numbers
+    }
+}
+
+
+extension String {
+    func lines() -> [String] {
+        var result: [String] = []
+        enumerateLines { line, _ in result.append(line) }
+        return result
+    }
+}
+
+extension Sequence {
+    func print(_ prefix: String = "") -> Self {
+        Swift.print(prefix, Array(self))
+        return self
+    }
+}
+
+extension Collection where Element: Collection {
+    func flatten() -> [Element.Element] {
+        flatMap { $0 }
+    }
+}