Wich Ip To Choose?

I have signed with a Virtual Private Hosting.

They gave me 2 IPs.

Now i want:
ns1.domain1.com
ns2.domain1.com

But when i want to set it up, they ask me an ip.

So i don't know if it is that i have to use:

1) One of the IPs they gave me.

2) The ips they use for their own name servers.

Why i suposse this?

Just because it should be the same:

ns1.hostingcompany.com 1.1.1.1
ns2.hostingcompany.com 1.1.1.1

This 2 name servers goes to a 2 different ips that when the client arrives there the URL is resolved.

So should be the same puting to my name servers

ns1.domain1.com 1.1.1.1
ns2.domain1.com 1.1.1.1

Since the only diference is the visual, the only diference is the name server that the people see but in the core there should be the same ips?

I'm right? or i should put the ips they asigned to my hosting site?

Please help me

Oscar
PS: If you answer that the ip's the hosting company assigned to me are the ones to use please tell me if a user arrives there shouldn't be correct since how do i send him to the correct place?.

Easy enough to figure out. If you are supposed to setup a DNS server to host the domain, then you use one of the IPs that your private server provider gave you. If your provider has a domain management page (I'm not talking about cpanel or webmin or ensim) where you can add and remove records, then you need to specify your private server providers name server IPs for ns1 and ns2.

If your domain is already working on one of the servers, then give me your domain name, and the IPs of your private server and the addresses of your provider's name servers. I'll tell you which one has the domain on it.