1st one
H->2^1+1
HTHT->2^4+4
TTHTHTHTHTHHTHTHTHTTTTTTHTHHHHHTT(33) -> 2^33+6(why)?

do you see any connection?

On Aug 24, 6:55 am, keyankarthi <keyankarthi1...@gmail.com> wrote:
> http://www.spoj.pl/problems/MAIN8_D/
>
> i tried solving this problem....
> any ideas...??
> for second test case 'htht'
> the states i considered are
> 1     T  -  (1/2) * x+1
> 2     HH - (1/4) * x+2
> 3     HTT - (1/8) * x+3
> 4     HTHH - (1/16) * x+4
> 5     HTHT  - (1/16)    (final state)
>
> x is the expected no of coins.
> x= 1 + 2+3+4+5
> gives 16x=15x+26
> x=26.
>
> answer given is 20...
> can any one explain this,

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