From b4cefdca7c5269b49ece02fb023bd451ae0f906d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gustav=20S=C3=B6rn=C3=A4s?= <gustav@sornas.net>
Date: Wed, 2 Dec 2020 06:27:10 +0100
Subject: day 02

---
 20/py/d02.py | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 20/py/d02.py

(limited to '20/py/d02.py')

diff --git a/20/py/d02.py b/20/py/d02.py
new file mode 100644
index 0000000..572404e
--- /dev/null
+++ b/20/py/d02.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+def pt1(_in):
+    valid = 0
+    for passwd in _in:
+        want, have = passwd.split(":")
+        want_num, want_char = want.split()
+        want_min, want_max = [int(s) for s in want_num.split("-")]
+        if want_min <= have.count(want_char) <= want_max:
+            valid += 1
+    return valid
+
+
+def pt2(_in):
+    valid = 0
+    for passwd in _in:
+        want, have = passwd.split(":")
+        want_num, want_char = want.split()
+        want_first, want_second = [int(s) for s in want_num.split("-")]
+        matches = 0
+        if have[want_first] == want_char:
+            matches += 1
+        if have[want_second] == want_char:
+            matches += 1
+        if matches == 1:
+            valid += 1
+    return valid
+
+
+if __name__ == "__main__":
+    input = open("../input/02", "r").readlines()
+    print(pt1(input))
+    print(pt2(input))
-- 
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