### Re^6: Generating all 5-card hands

by Roy Johnson (Monsignor)
 on May 18, 2005 at 17:58 UTC ( #458354=note: print w/replies, xml ) Need Help??

in reply to Re^5: Generating all 5-card hands
in thread Generating all 5-card hands

If you want to prove that no hand with a 5 isn't worth at least 2 points you HAVE to consider suits.
Why? You aren't interested in the case where they are the same suit. You just assume that they're not all the same suit; which suits they are is immaterial.

Caution: Contents may have been coded under pressure.

Replies are listed 'Best First'.
Re^7: Generating all 5-card hands
by Limbic~Region (Chancellor) on May 18, 2005 at 20:34 UTC
Roy Johnson,
Because (but not really). To quote thor:

What I want to do is write a program that brute forces the issue. That is to say that I want to create a program that scores all 5-card hands that have a 5 in them and see what happens.

Eliminating suits doesn't meet the original requirements. That isn't to say there is anything wrong with appending or updating or clariffying the original requirements. I was just saying that if you want all then you need all. I did go on to say it is possible to prove it by starting out conceptually with all the known impossible solutions removed and only testing the remainder.

Incidently, believe the brute force part is easy. Start by selecting 4 card hands (5 is assumed) from 1..4, 6..9 where no combination adds up to 10:

```1 3 4 8 - BAD (3,4,5)
1 4 7 8 - BAD (7 + 8 = 15)
1 6 7 8 - BAD (7 + 8 = 15)
2 3 4 9 - BAD (9 + 4 + 2 = 15)
2 3 6 9 - BAD (9 + 6 = 15)
2 4 7 9 - BAD (9 + 4 + 2 = 15)
2 6 7 9 - BAD (9 + 6 = 15)
3 4 8 9 - BAD (3,5,5)
3 6 8 9 - BAD (9 + 6 = 15)
4 7 8 9 - BAD (7 + 8 = 15)
6 7 8 9 - BAD (9 + 6 = 15)
I used the following code (see this for combo sub):
```#!/usr/bin/perl
use strict;
use warnings;

# Assume that all
my \$iter = combo( 4, 1..4, 6..9 );
while ( my @combo = \$iter->() ) {
next if make_10( @combo );
print "@combo\n";
}

sub make_10 {
my @hand = @_;

for ( 2 .. 4 ) {
my \$iter = combo( \$_, @hand );
while ( my @combo = \$iter->() ) {
my \$tot = 0;
\$tot += \$_ for @combo;
return 1 if \$tot == 10;
}
}
return 0;
}

Cheers - L~R

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