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authorThomas Voss <mail@thomasvoss.com> 2023-12-03 15:02:28 +0100
committerThomas Voss <mail@thomasvoss.com> 2023-12-03 15:02:28 +0100
commitfdba09c1c6c67c9081cf470cd6b3c4e8b7670cf6 (patch)
tree43143d417c72e81ccf2a52a5d489b9aca9e984b3 /2023/03
parentc1875f1bee7c07227942a831e466f2c262339439 (diff)
Add 2023 day 3 part 1 solution
Diffstat (limited to '2023/03')
-rw-r--r--2023/03/input140
-rwxr-xr-x2023/03/puzzle-1.py35
2 files changed, 175 insertions, 0 deletions
diff --git a/2023/03/input b/2023/03/input
new file mode 100644
index 0000000..bc52a0b
--- /dev/null
+++ b/2023/03/input
@@ -0,0 +1,140 @@
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diff --git a/2023/03/puzzle-1.py b/2023/03/puzzle-1.py
new file mode 100755
index 0000000..d078c4d
--- /dev/null
+++ b/2023/03/puzzle-1.py
@@ -0,0 +1,35 @@
+#!/usr/bin/python
+
+import re
+
+
+def main() -> None:
+ with open("input", "r", encoding="utf-8") as f:
+ data = f.read()
+
+ symbols = set()
+ matches = []
+
+ lines = [line for line in data.split('\n') if line]
+ for i, line in enumerate(lines):
+ for match in re.finditer(r'\d+', line):
+ matches.append((i, match))
+ for match in re.finditer(r'[^0-9.]', line):
+ symbols.add((i, match.start()))
+
+ acc = 0
+ for match in matches:
+ l, m = match
+ s, e = m.span()
+ ps = [(l, s-1), (l, e)]
+ for i in range(s-1, e+1):
+ ps.append((l-1, i))
+ ps.append((l+1, i))
+ for p in ps:
+ if p in symbols:
+ acc += int(m.group(0))
+
+ print(acc)
+
+if __name__ == "__main__":
+ main()