d01

day01/d01p1.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+let filePath = CommandLine.arguments[1]
+let content =  try? String(contentsOfFile: filePath, encoding: .ascii)
+let lines = content!.split(separator: "\n")
+var leftList: [Int] = []
+var rightList: [Int] = []
+for line in lines {
+    let lr = line.split(separator: " ")
+    leftList.append(Int(lr[0])!)
+    rightList.append(Int(lr[1])!)
+}
+leftList.sort()
+rightList.sort()
+print(zip(leftList, rightList).reduce(0, { sum, lr in sum + abs(lr.0 - lr.1) }))