Solved 2024/18 P2

2024-12-19 18:04:23 +01:00
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+## \-\-- Day 19: Linen Layout \-\--
+
+Today, The Historians take you up to the [hot springs](/2023/day/12) on
+Gear Island! Very
+[suspiciously](https://www.youtube.com/watch?v=ekL881PJMjI),
+absolutely nothing goes wrong as they begin their careful search of the
+vast field of helixes.
+
+Could this *finally* be your chance to visit the
+[onsen](https://en.wikipedia.org/wiki/Onsen) next door?
+Only one way to find out.
+
+After a brief conversation with the reception staff at the onsen front
+desk, you discover that you don\'t have the right kind of money to pay
+the admission fee. However, before you can leave, the staff get your
+attention. Apparently, they\'ve heard about how you helped at the hot
+springs, and they\'re willing to make a deal: if you can simply help
+them *arrange their towels*, they\'ll let you in for *free*!
+
+Every towel at this onsen is marked with a *pattern of colored stripes*.
+There are only a few patterns, but for any particular pattern, the staff
+can get you as many towels with that pattern as you need. Each
+stripe
+can be *white* (`w`), *blue* (`u`), *black* (`b`), *red* (`r`), or
+*green* (`g`). So, a towel with the pattern `ggr` would have a green
+stripe, a green stripe, and then a red stripe, in that order. (You
+can\'t reverse a pattern by flipping a towel upside-down, as that would
+cause the onsen logo to face the wrong way.)
+
+The Official Onsen Branding Expert has produced a list of *designs* -
+each a long sequence of stripe colors - that they would like to be able
+to display. You can use any towels you want, but all of the towels\'
+stripes must exactly match the desired design. So, to display the design
+`rgrgr`, you could use two `rg` towels and then an `r` towel, an `rgr`
+towel and then a `gr` towel, or even a single massive `rgrgr` towel
+(assuming such towel patterns were actually available).
+
+To start, collect together all of the available towel patterns and the
+list of desired designs (your puzzle input). For example:
+
+    r, wr, b, g, bwu, rb, gb, br
+
+    brwrr
+    bggr
+    gbbr
+    rrbgbr
+    ubwu
+    bwurrg
+    brgr
+    bbrgwb
+
+The first line indicates the available towel patterns; in this example,
+the onsen has unlimited towels with a single red stripe (`r`), unlimited
+towels with a white stripe and then a red stripe (`wr`), and so on.
+
+After the blank line, the remaining lines each describe a design the
+onsen would like to be able to display. In this example, the first
+design (`brwrr`) indicates that the onsen would like to be able to
+display a black stripe, a red stripe, a white stripe, and then two red
+stripes, in that order.
+
+Not all designs will be possible with the available towels. In the above
+example, the designs are possible or impossible as follows:
+
+-   `brwrr` can be made with a `br` towel, then a `wr` towel, and then
+    finally an `r` towel.
+-   `bggr` can be made with a `b` towel, two `g` towels, and then an `r`
+    towel.
+-   `gbbr` can be made with a `gb` towel and then a `br` towel.
+-   `rrbgbr` can be made with `r`, `rb`, `g`, and `br`.
+-   `ubwu` is *impossible*.
+-   `bwurrg` can be made with `bwu`, `r`, `r`, and `g`.
+-   `brgr` can be made with `br`, `g`, and `r`.
+-   `bbrgwb` is *impossible*.
+
+In this example, `6` of the eight designs are possible with the
+available towel patterns.
+
+To get into the onsen as soon as possible, consult your list of towel
+patterns and desired designs carefully. *How many designs are possible?*
+
+To begin, [get your puzzle input](19/input).
+
+Answer:
+
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+#!/bin/python3
+import sys,time,re
+from pprint import pprint
+sys.path.insert(0, '../../')
+from fred import list2int,get_re,nprint,bfs
+start_time = time.time()
+
+input_f = 'test'
+
+def loadFile():
+    colors = []
+    towels = []
+    with open(input_f) as file:
+        for l,line in enumerate(file):
+            if l == 0:
+                colors = line.rstrip().split(',')
+            if l > 1:
+                towels.append(line.rstrip())
+    return colors,towels
+
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+
+
+
+def part1():
+    colors,towels = loadFile()
+   
+    return 
+    
+start_time = time.time()
+print('Part 1:',part1(), '\t\t', round((time.time() - start_time)*1000), 'ms')
+
+
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+def part2():
+    return
+    
+start_time = time.time()
+print('Part 2:',part2(), '\t\t', round((time.time() - start_time)*1000), 'ms')