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99 prisoners 100% chance to alive, 1 prisoner 50% chance to alive
- HTuanptit December 05, 2012Define: Red =1; Blue = 0
The 100th will announce: (1st + 2nd + 3rd +...+ 99th) mod 2
So, the 99th, who can see the value of (1st, 2nd, 3rd.., 98th), and total of them, will know his value (color of hat)
... the same to other prisoners