Leetcode 2. ADD Numbers Swift

////Main.swift//LEETCODE02////Created by Guola on 16/1/21.//copyright©2016 year Guola. All rights reserved.//import Foundationfunc input ()-String {let keyboard=nsfilehandle.filehandlewithstandardinput () let Inputdata=Keyboard.availabledata Let Strdata= NSString (Data:inputdata, encoding:nsutf8stringencoding)!returnStrdata.stringbytrimmingcharactersinset (Nscharacterset.newlinecharacterset ())}classlistnode{varVal:intvarNext:listnode?Init (_ Num:int) {val=Num Next=Nil} func desc ()-string{varRet:string =String (val)varnode =Next whileNode! =Nil {ret= Ret.stringbyappendingformat ("->%d", (node?). val)!) Node=node!. Next}returnret}} Public classsolutionaddtwonumbers{func addtwonumbers (L1:listnode?, L2:listnode?) -listnode{let Ret:listnode= ListNode (-1)        varp1=L1varP2=L2varP:listnode =retifL1 = = Nil {ret.next = L2;returnret;} ifL2 = = Nil {ret.next = L1;returnret;} varP1count =0         whileP1! =Nil {P1=p1?. Next P1count++        }        varP2count =0         whileP2! =Nil {P2=p2?. Next P2count++        }                ifP2count >P1count {P1=L2 P2=L1}Else{P1=L1 P2=L2} whileP1! =Nil {ifP2 = =Nil {varsum=p1!. ValifP.next! =Nil {sum+ = (p.next!. val); } P.next=listnode (sum%Ten) P=p.next!ifsum/Ten>0{P.next = ListNode (1)} p1=p1?. Next} whileP2! =Nil {varsum=p1!. val+p2!. ValifP.next! =Nil {sum+ = (p.next!. val); } P.next=listnode (sum%Ten) P=p.next!ifsum/Ten>0{P.next = ListNode (1)} p1=p1!. Next P2=p2!. Next}} returnret.next!; }}func listnodecreate (str:string)-ListNode {let str:[string]= Str.componentsseparatedbystring (" -")    varList:listnode = ListNode (-1) let ret=List forSinchStr {list.next= ListNode (Int (s)!)) List=list.next!    }        returnret.next!}varTestcaseaddtownumber =solutionaddtwonumbers ()varL1:string =""Repeat{print ("Enter ListNode1: (Input exit,program end!)")//var l1 = "2->3->4"L1 =input ()ifL1 = ="Exit"{ Break}print ("Enter ListNode2:")//var L2 = "1->2->3"varL2 =input () let Nodel1=listnodecreate (L1) let Nodel2=listnodecreate (L2) print (Nodel1.desc ()) print (Nodel2.desc ())varTow =solutionaddtwonumbers ()varRET =tow.addtwonumbers (Nodel1, L2:nodel2) print (Ret.desc ())} whileL1! ="Exit"

Test input

1->8

0

Results: 1->8

0

7->3

Result 7->3

3
4->2
Results: 7 2

6
4->2
Results: 0 3

3->4->5
1->2->3
Results: 4->6->8

9->4->5
1->2->3
Results: 0->7->8

3->8->5
1->2->3
Results: 4->0->9

3->4->7
1->2->3
Results: 4->6->0->1

Leetcode 2. ADD Numbers Swift