>Nadya,
>
>>snip<
>
>They all pair up telling their partners the other fellow's hat color. None lost.

How it correlates with thier own color?

I already told and everyone already guessed, that 99 have 100% to survive and the last one has 50% probability.

I gave a hint to Steve, that "White" or "Black" can mean something (e.g. be a "secret code"). I could not give any more hints, since now the solution must be obvious.