tadd day 3 part 2 - aoc22 - advent of code 2022 solutions
 (HTM) git clone git://src.adamsgaard.dk/aoc22
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       ---
 (DIR) commit 1507978f5cbd50e4aa85be9532a9b0555d5148e5
 (DIR) parent d542900c3f9dd47037e95ba4525cd280933dccec
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Sat,  3 Dec 2022 11:59:31 +0000
       
       add day 3 part 2
       
       Diffstat:
         A 3/aoc3b                             |      21 +++++++++++++++++++++
         M 3/mkfile                            |       8 ++++++--
       
       2 files changed, 27 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/3/aoc3b b/3/aoc3b
       t@@ -0,0 +1,21 @@
       +#!/bin/awk -f
       +function val(c) {
       +        if (n=index(items, c))
       +                sub(c, "_", items)
       +        return n
       +}
       +{
       +        items = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
       +        s1=$0
       +        getline
       +        s2=$0
       +        getline
       +        s3=$0
       +        n1 = length(s1)
       +        for (i=1; i<=n1; i++) {
       +                c = substr(s1, i, 1)
       +                if (index(s2, c) && index(s3, c))
       +                        sum += val(c)
       +        }
       +}
       +END{ print sum }
 (DIR) diff --git a/3/mkfile b/3/mkfile
       t@@ -1,8 +1,13 @@
        run:V:
                ./aoc3 <input
       +        ./aoc3b <input
        
        test:V:
                # 16 (p), 38 (L), 42 (P), 22 (v), 20 (t), and 19 (s)
                # correct sum is 157
                ./aoc3 <testinput
       -        
       -\ No newline at end of file
       +
       +test2:V:
       +        # group 1 = r, group 2 = Z
       +        # sum must be 18+52=70
       +        ./aoc3b <testinput