Started work on 2024/08 P1

2015/10/10.md

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+## \-\-- Day 10: Elves Look, Elves Say \-\--
+
+Today, the Elves are playing a game called
+[look-and-say](https://en.wikipedia.org/wiki/Look-and-say_sequence).
+They take turns making sequences by reading aloud the previous sequence
+and using that reading as the next sequence. For example, `211` is read
+as \"one two, two ones\", which becomes `1221` (`1` `2`, `2` `1`s).
+
+Look-and-say sequences are generated iteratively, using the previous
+value as input for the next step. For each step, take the previous
+value, and replace each run of digits (like `111`) with the number of
+digits (`3`) followed by the digit itself (`1`).
+
+For example:
+
+-   `1` becomes `11` (`1` copy of digit `1`).
+-   `11` becomes `21` (`2` copies of digit `1`).
+-   `21` becomes `1211` (one `2` followed by one `1`).
+-   `1211` becomes `111221` (one `1`, one `2`, and two `1`s).
+-   `111221` becomes `312211` (three `1`s, two `2`s, and one `1`).
+
+Starting with the digits in your puzzle input, apply this process 40
+times. What is *the length of the result*?
+
+Your puzzle answer was `360154`.
+
+## \-\-- Part Two \-\-- {#part2}
+
+Neat, right? You might also enjoy hearing [John Conway talking about
+this sequence](https://www.youtube.com/watch?v=ea7lJkEhytA) (that\'s
+Conway of *Conway\'s Game of Life* fame).
+
+Now, starting again with the digits in your puzzle input, apply this
+process *50* times. What is *the length of the new result*?
+
+Your puzzle answer was `5103798`.
+
+Both parts of this puzzle are complete! They provide two gold stars:
+\*\*
+
+At this point, you should [return to your Advent calendar](/2015) and
+try another puzzle.
+
+Your puzzle input was `1113122113`{.puzzle-input}.
+

2015/10/solution.py

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+#!/bin/python3
+import sys,time,re
+from pprint import pprint
+from itertools import groupby
+sys.path.insert(0, '../../')
+from fred import list2int,get_re,nprint,lprint,loadFile
+start_time = time.time()
+
+input_f = 'input'
+
+part = 1
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+
+if part == 1:
+    instructions = loadFile(input_f)[0]
+    print(instructions)
+
+    for i in range(0,50):
+        numbers = [(len(list(group)),key) for key, group in groupby(instructions)]
+        result = ''
+        for n in numbers:
+            result += str(n[0])+str(n[1])
+        #print(instructions,'->',result)
+        instructions = result
+        #input()
+    print(len(instructions))    
+
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+if part == 2:
+    exit()
+
+print("--- %s seconds ---" % (time.time() - start_time))