Programming

I keep getting a You must retrieve the first page! error even though I retrived it

If you are using the correct formula it’s fine. Try to loop over again until at some point you should get the flag.

Hey!, I cant understand what does it means when I get "You must retrieve the first page!"
what page?
what do they mean when saying retrieve?
What I did is a bot that solves the problem at http://challenge01.root-me.org/programmation/ch1/
and sends the result to http://challenge01.root-me.org/programmation/ch1/ep1_v.php?result={result}
And it keeps answering ’You must retrieve the first page!’ does it means I didn’t got the right answer or I run out of time or something else?
Please help.

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