2 sum problem with swift 4.2

Author: askari01

Two-Sum Problem/Solution 1/2Sum.playground/Contents.swift

@@ -1,8 +1,5 @@
 //: Two Sum
-// Last checked with: Version 9.0 (9A235)
-#if swift(>=4.0)
-print("Hello, Swift 4!")
-#endif
+// Last checked with: Version 10.0 (10A255)
 
 func twoSum(_ nums: [Int], target: Int) -> (Int, Int)? {
     var dict = [Int: Int]()

Two-Sum Problem/Solution 1/2Sum.playground/playground.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

Two-Sum Problem/Solution 2/2Sum.playground/Contents.swift

@@ -1,8 +1,5 @@
 //: Playground - noun: a place where people can play
-// Last checked with: Version 9.0 beta 4 (9M189t)
-#if swift(>=4.0)
-print("Hello, Swift 4!")
-#endif
+// Last checked with: Version 10.0 (10A255)
 
 func twoSumProblem(_ a: [Int], k: Int) -> ((Int, Int))? {
   var i = 0

Two-Sum Problem/Solution 2/2Sum.playground/playground.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>