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 [quote="Zag"]really? Wow. I was at 11.84915 (expecting, actually, to tie for a win with several people, because it isn't that hard to find). I'm amazed that it can be beaten.[/quote]
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MatthewV
Posted: Thu Mar 01, 2012 10:29 am    Post subject: 1

I guess this one was too easy

Well, it shouldn't be too surprising to the two participants...

Elethiomel (around 12.02)
(9 + 20 + 9) * (19 - 1 / 12 - 5 + 1 + 16 + 25) + 5 + 1 + 18=2 148.83333

Zag (9 + 2 + 0.84915 = 11.84915)
9 + 20 + 9 + 19 + 1 + 12*(5+1) + 16*25*5 + 1 + 18 = 2149

Elethiomel and Zag
9 + 20 - 9 + 19 + 1 + (12 + 5 + 1 + 16*25)*5 + 1 + 18 = 2149
cost = 1 + 2 + 3 + 3 + 0.84915 = 9.84915
Elethiomel
Posted: Thu Mar 01, 2012 10:28 am    Post subject: 0

I took a similar approach, in that I used Python and approached the problem as a string processing problem, simply using eval() for evaluating expressions. By the look of your parameters, I also limited the search space much more, and once I found some good solutions I knew there was no need to make a broader search.
novice
Posted: Thu Mar 01, 2012 8:58 am    Post subject: -1

Well here's what my javascript solver could come up with before it crashed after 12550000 formulas:

Javascript is probably not the best language to code this in.
But using an interpreted language saved me from writing an evaluation function, and the solver also works as a javascript performance benchmark.
MatthewV
Posted: Thu Mar 01, 2012 5:36 am    Post subject: -2

Oh right, this ends in a few hours.
Elethiomel
Posted: Wed Feb 22, 2012 8:05 pm    Post subject: -3

Here is mine. One -, Two *, One set of parens.

9 + 20 - 9 + 19 + 1 + ( 12 + 5 + 1 + 16 * 25 ) * 5 + 1 + 18 = 2149

The first one I submitted was more accurate, but used another set of parens:

(9 + 20 + 9) * (19 - 1 / 12 - 5 + 1 + 16 + 25) + 5 + 1 + 18 = 2148 5/6

I only take credit for the programming effort, though. My computer did all the legwork.

Nice work solving these manually.
Zag
Posted: Wed Feb 22, 2012 8:01 pm    Post subject: -4

OK. You shouldn't have said anything. Now I have your answer, too. And I just solved it by hand -- no computer assistance. (Well, just a calculator).
Zag
Posted: Wed Feb 22, 2012 7:27 pm    Post subject: -5

9 + 20 + 9 + 19 + 1 + 12*(5+1) + 16*25*5 + 1 + 18 = 2149

Cost = 9 + 2 + 0.84915 = 11.84915 (Three *, one set of parens, difference times 5)

Edit:

9 + 20 + 9 + 19 + 1 - 12- 5 + (1 + 16)*25*5 + 1 - 18 = 2149

Exactly the same cost.
Zag
Posted: Wed Feb 22, 2012 7:16 pm    Post subject: -6

really? Wow. I was at 11.84915 (expecting, actually, to tie for a win with several people, because it isn't that hard to find). I'm amazed that it can be beaten.
Elethiomel
Posted: Wed Feb 22, 2012 1:58 pm    Post subject: -7

Sent a new one. Under 10 points.
mv*
Posted: Wed Feb 22, 2012 2:55 am    Post subject: -8

next time I am going to make () much more expensive!
Elethiomel
Posted: Tue Feb 21, 2012 11:52 pm    Post subject: -9

Sent. Under 14 points.
Zag
Posted: Tue Feb 21, 2012 4:20 pm    Post subject: -10

Sent. Under 15 points.
novice
Posted: Tue Feb 21, 2012 12:33 pm    Post subject: -11

But what have leap years got to do with anything?
MatthewV
Posted: Tue Feb 21, 2012 11:51 am    Post subject: -12

The objective is to is to use the randomly chosen numbers 9 20 9 19 1 12 5 1 16 25 5 1 18
to be as close to 2012+29*(2+e) (2148.83017...) with the smallest score. The numbers must be used in order. Mathematical symbols have the following cost:

Code:
sign  cost  example

+    free  3+9=12
-    1     5-3-1=1   (cost of 1*2=2)
*    3     4*3*3=36  (cost of 3*2=6)
/    3     20/5=4  (cost of 3)
^    5     2^4=16    (roots can be made with ^.5 for the same cost)
()   2     5*(2+4)=30 (NOTE: the * is not included in the cost) (cost: 3+2=5)
!    7     4!=24
|ab|  4     |-12|=12

log   7     log100=2  (ONLY base 10)
ln    10     ln60=4.094344...

combining two numbers (you have 17 and 3 next to each other->173)
10

sin
cos
tan   10   (ONLY in radians)
csc
sec
cot

asin
acos
atan  10 (arctan) (output in radians)
acsc
asec
acot

Being away from 2012+29*(2+e) has the cost of 5*(distance away) If you get to 2150, 5*(2012+29*(2+e)-2150)= ~5.85. This will be carried out as far as needed to break ties when possible.

The order of operations are very important. Submissions may be PMed to me or posted in the thread.

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This will end on February 29 at 11:59 Alaska Time.

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