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RestoreIp.cs
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RestoreIp.cs
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using System;
using System.Collections.Generic;
using System.Linq;
public class RestoreIp{
static void Main(string [] args){
string A = "25525511135";
string B = "25505011535";
Check(A);
}
static int is_Safe(string ip){
IList<string> ips=new List<string>();
string ex="";
for(int i=0;i<ip.Length;i++){
if(ip[i]=='.'){
ips.Add(ex);
ex="";
}
else{
ex=ex+ip[i];
}
}
ips.Add(ex);
for(int i=0;i<ips.Count;i++){
if(int.Parse(ips[i])>255 ||int.Parse(ips[i])<0 || ips[i].Length>3 ) return 0;
if(ips[i].Length >1 && int.Parse(ips[i])==0) return 0;
if(ips[i].Length >1 && int.Parse(ips[i])!=0 && ips[i][0]=='0') return 0;
}
return 1;
}
static void Check(string ip){
int length = ip.Length;
if(length>12 || length<4){
Console.WriteLine("NOt Valid");
}
IList<string> res = new List<string>();
string check = ip;
for(int i=1;i<length-2;i++){
for(int j=i+1;j<length-1;j++){
for(int k=j+1;k<length;k++){
check = check.Substring(0,k)+"."+check.Substring(k);
check=check.Substring(0,j)+"."+check.Substring(j);
check=check.Substring(0,i)+"."+check.Substring(i);
if(is_Safe(check)==1){
res.Add(check);
Console.WriteLine(check);
}
check = ip;
}
}
}
}
}