From: Brett Parker <iDunno@sommitrealweird.co.uk>
Date: Sun, 20 Dec 2020 14:30:26 +0000 (+0000)
Subject: Day 18 p1
X-Git-Url: https://git.sommitrealweird.co.uk/advent-of-code-2020.git/commitdiff_plain/b1754ed665fed108a29cd4f9f5d6bee7c38f0258

Day 18 p1
---

diff --git a/day18/badmath.py b/day18/badmath.py
new file mode 100755
index 0000000..b7e6dda
--- /dev/null
+++ b/day18/badmath.py
@@ -0,0 +1,72 @@
+#!/usr/bin/python3
+
+import sys
+
+filename="p1_71.txt"
+if len(sys.argv) > 1:
+    filename=sys.argv[1]
+
+def parse_sum(oursum):
+    parts = oursum.split()
+    new_parts=[]
+    for part in parts:
+        if part[0]=="(":
+            for index,c in enumerate(part):
+                if c=="(":
+                    new_parts.append("(")
+                else:
+                    new_parts.append(part[index:])
+                    break
+        elif part[-1]==")":
+            got_number=False
+            for index,c in enumerate(part):
+                if c==")":
+                    if not got_number:
+                        new_parts.append(part[0:index])
+                        got_number=True
+                    new_parts.append(c)
+        else:
+            new_parts.append(part)
+    return new_parts
+
+def do_sum(parts):
+    cur_total=0
+    next_oper="+"
+    bracketed=[]
+    in_brackets=0
+    for part in parts:
+        if in_brackets > 0 and part != ")" and part != "(":
+            bracketed.append(part)
+            continue
+        if in_brackets > 0 and part == ")":
+            in_brackets-=1
+            bracketed.append(part)
+            if in_brackets == 0:
+                part=do_sum(bracketed[1:-1])
+                bracketed.clear()
+            else:
+                continue
+        if part == "+":
+            next_oper="+"
+        elif part == "*":
+            next_oper="*"
+        elif part == "(":
+            in_brackets+=1
+            bracketed.append(part)
+        else:
+            part=int(part)
+            if next_oper == "+":
+                cur_total+=part
+            else:
+                cur_total*=part
+    return cur_total
+
+total=0
+total2=0
+for line in [line.rstrip() for line in open(filename, "r")]:
+    answer=do_sum(parse_sum(line))
+    total+=answer
+
+print("Part 1 Total:", total)
+
+
diff --git a/day18/input.txt b/day18/input.txt
new file mode 100644
index 0000000..fe9f5db
--- /dev/null
+++ b/day18/input.txt
@@ -0,0 +1,374 @@
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diff --git a/day18/p1_12240.txt b/day18/p1_12240.txt
new file mode 100644
index 0000000..81fdf5d
--- /dev/null
+++ b/day18/p1_12240.txt
@@ -0,0 +1 @@
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diff --git a/day18/p1_13632.txt b/day18/p1_13632.txt
new file mode 100644
index 0000000..9a421d5
--- /dev/null
+++ b/day18/p1_13632.txt
@@ -0,0 +1 @@
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diff --git a/day18/p1_26.txt b/day18/p1_26.txt
new file mode 100644
index 0000000..ea858ad
--- /dev/null
+++ b/day18/p1_26.txt
@@ -0,0 +1 @@
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diff --git a/day18/p1_437.txt b/day18/p1_437.txt
new file mode 100644
index 0000000..48e9a4e
--- /dev/null
+++ b/day18/p1_437.txt
@@ -0,0 +1 @@
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diff --git a/day18/p1_51.txt b/day18/p1_51.txt
new file mode 100644
index 0000000..f2deb00
--- /dev/null
+++ b/day18/p1_51.txt
@@ -0,0 +1 @@
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diff --git a/day18/p1_71.txt b/day18/p1_71.txt
new file mode 100644
index 0000000..792bc09
--- /dev/null
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