started on 2017/09

2017/09/9.md

@@ -0,0 +1,75 @@
+## \-\-- Day 9: Stream Processing \-\--
+
+A large stream blocks your path. According to the locals, it\'s not safe
+to [cross the
+stream]{title="\"Don't cross the streams!\", they yell, even though there's only one. They seem to think they're hilarious."}
+at the moment because it\'s full of *garbage*. You look down at the
+stream; rather than water, you discover that it\'s a *stream of
+characters*.
+
+You sit for a while and record part of the stream (your puzzle input).
+The characters represent *groups* - sequences that begin with `{` and
+end with `}`. Within a group, there are zero or more other things,
+separated by commas: either another *group* or *garbage*. Since groups
+can contain other groups, a `}` only closes the *most-recently-opened
+unclosed group* - that is, they are nestable. Your puzzle input
+represents a single, large group which itself contains many smaller
+ones.
+
+Sometimes, instead of a group, you will find *garbage*. Garbage begins
+with `<` and ends with `>`. Between those angle brackets, almost any
+character can appear, including `{` and `}`. *Within* garbage, `<` has
+no special meaning.
+
+In a futile attempt to clean up the garbage, some program has *canceled*
+some of the characters within it using `!`: inside garbage, *any*
+character that comes after `!` should be *ignored*, including `<`, `>`,
+and even another `!`.
+
+You don\'t see any characters that deviate from these rules. Outside
+garbage, you only find well-formed groups, and garbage always terminates
+according to the rules above.
+
+Here are some self-contained pieces of garbage:
+
+-   `<>`, empty garbage.
+-   `<random characters>`, garbage containing random characters.
+-   `<<<<>`, because the extra `<` are ignored.
+-   `<{!>}>`, because the first `>` is canceled.
+-   `<!!>`, because the second `!` is canceled, allowing the `>` to
+    terminate the garbage.
+-   `<!!!>>`, because the second `!` and the first `>` are canceled.
+-   `<{o"i!a,<{i<a>`, which ends at the first `>`.
+
+Here are some examples of whole streams and the number of groups they
+contain:
+
+-   `{}`, `1` group.
+-   `{{{}}}`, `3` groups.
+-   `{{},{}}`, also `3` groups.
+-   `{{{},{},{{}}}}`, `6` groups.
+-   `{<{},{},{{}}>}`, `1` group (which itself contains garbage).
+-   `{<a>,<a>,<a>,<a>}`, `1` group.
+-   `{{<a>},{<a>},{<a>},{<a>}}`, `5` groups.
+-   `{{<!>},{<!>},{<!>},{<a>}}`, `2` groups (since all but the last `>`
+    are canceled).
+
+Your goal is to find the total score for all groups in your input. Each
+group is assigned a *score* which is one more than the score of the
+group that immediately contains it. (The outermost group gets a score of
+`1`.)
+
+-   `{}`, score of `1`.
+-   `{{{}}}`, score of `1 + 2 + 3 = 6`.
+-   `{{},{}}`, score of `1 + 2 + 2 = 5`.
+-   `{{{},{},{{}}}}`, score of `1 + 2 + 3 + 3 + 3 + 4 = 16`.
+-   `{<a>,<a>,<a>,<a>}`, score of `1`.
+-   `{{<ab>},{<ab>},{<ab>},{<ab>}}`, score of `1 + 2 + 2 + 2 + 2 = 9`.
+-   `{{<!!>},{<!!>},{<!!>},{<!!>}}`, score of `1 + 2 + 2 + 2 + 2 = 9`.
+-   `{{<a!>},{<a!>},{<a!>},{<ab>}}`, score of `1 + 2 = 3`.
+
+*What is the total score* for all groups in your input?
+
+To begin, [get your puzzle input](9/input).
+
+Answer:

2017/09/solution.py

@@ -0,0 +1,53 @@
+#!/bin/python3
+import sys,re
+from pprint import pprint
+
+input_f = 'test'
+
+part = 1
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+
+if part == 1:
+    with open(input_f) as file:
+        for line in file:
+            print(line.rstrip())
+            clean_string = re.sub(r"!.", "", line.rstrip())
+            clean_string = re.sub(r"<.*?>", "", clean_string)
+            clean_string = re.sub(r",", "", clean_string)
+            #print(clean_string)
+
+            count = 1
+            score = 0
+            iteration = 0
+            #print('Score of ',end='')
+            while True:
+                #print('Iteration: ', iteration)
+                matches = re.findall(r"\{\}", clean_string)
+                if not matches:
+                    #print(increment,end='')
+                    print('=',score)
+                    break
+                
+                
+                
+                clean_string = re.sub(r"\{\}", "", clean_string)
+                iteration += 1
+                for x in range(0,len(matches)):
+                    score += iteration
+                    print(iteration,end="")
+                
+
+                #print(clean_string)
+            #rint(count)
+            input()
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+if part == 2:
+    exit()

solution.py

@@ -1,16 +1,17 @@
 #!/bin/python3
-import sys
+import sys,re
 from pprint import pprint
 
-input_f = sys.argv[1]
-
+input_f = 'test'
 
+part = 1
 #########################################
 #                                       #
 #              Part 1                   #
 #                                       #
 #########################################
 
+if part == 1
 with open(input_f) as file:
     for line in file:
 
@@ -22,3 +23,5 @@ with open(input_f) as file:
 #              Part 2                   #
 #                                       #
 #########################################
+if part == 2:
+    exit()