added 2015/day10

anight · anight · commit a3693e53990e · 2025-05-07T12:06:04.000+01:00
diff --git a/2015/day10/answers.txt b/2015/day10/answers.txt
@@ -0,0 +1,2 @@
+492982
+6989950
diff --git a/2015/day10/input.txt b/2015/day10/input.txt
@@ -0,0 +1 @@
+1321131112
diff --git a/2015/day10/run.py b/2015/day10/run.py
@@ -0,0 +1,44 @@
+#! /usr/bin/env python3
+
+def load_data(filename):
+	with open(filename, 'r') as f:
+		line = f.readline().rstrip('\n')
+		return line
+
+# Part One
+
+data = load_data('input.txt')
+
+def expand(data):
+	ret = ''
+	last = None
+	cnt = 0
+	for digit in data:
+		if last != digit:
+			if last is not None:
+				ret += str(cnt) + last
+			last = digit
+			cnt = 1
+		else:
+			cnt += 1
+	if last is not None:
+		ret += str(cnt) + last
+	return ret
+
+times = 40
+
+for _ in range(times):
+	data = expand(data)
+
+print(len(data))
+
+# Part Two
+
+data = load_data('input.txt')
+
+times = 50
+
+for _ in range(times):
+	data = expand(data)
+
+print(len(data))
diff --git a/README.md b/README.md
@@ -1,6 +1,6 @@
 ```
       1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
-2015 ++ ++ ++ ++ ++ ++ ++ ++ ++ -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- +
+2015 ++ ++ ++ ++ ++ ++ ++ ++ ++ ++ -- -- -- -- -- -- -- -- -- -- -- -- -- -- +
 2016 ++ ++ ++ ++ ++ ++ ++ ++ ++ -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -
 2017 ++ ++ ++ ++ ++ ++ ++ ++ ++ -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -
 2018 ++ ++ ++ ++ ++ ++ ++ ++ ++ -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- +
