Problem 2318. Combine Cards to make 21

Created by James Kristoff

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Solution Stats

151 Solutions
35 Solvers

Last Solution submitted on Sep 29, 2022

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

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Alfonso Nieto-Castanon on 14 May 2014

nice problem!, consider perhaps adding 'AAA' (with solutions {'+-','-+'}) to the testsuite to make it more challenging

James Kristoff on 16 May 2014

Thanks for the suggestion Alfonso. That does make things a little more challenging. :)

J.R.! Menzinger on 19 May 2014

Did you have fun this this last test case, isn't it?? XDDD

YOU... BAD GUYS!! ;-)

Rafael S.T. Vieira on 13 Sep 2020

J,Q, and K all have value 10. This rule should be probably added to the problem description.

Solution Comments

Solution 1245633

1 Comment

1 Comment

Highphi on 25 Jul 2020

soft

Solution 609044

1 Comment

1 Comment

Highphi on 25 Jul 2020

trash

Solution 444970

2 Comments

2 Comments

Marco Castelli on 22 May 2014

Probably I don't understand what problem ask, but...I think test suite is wrong. For example: test suite 2.
cards = 'A23QJK';
mathSymbols = {'+-/++'};
1+2=3-3=0/9=0+8=8+10=18 that is not 21!
I found {'+-+-+','+/*--','-+-++','-*/++'}=21.
I've problem even in test 5

Alfonso Nieto-Castanon on 22 May 2014

'A' can take the value 1 or 11 (e.g. 'AAA' with symbols '+-' means 11+11-1==21). 'JQK' all count as 10 (e.g. 'A23QJK' with symbols '+-/++' means ((11+2)-3)/10+10+10==21)

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