From 78ee9f6ec7d986e85cc39af5eaf144ac046465d4 Mon Sep 17 00:00:00 2001
From: gabe <gabevenberg@gmail.com>
Date: Fri, 19 Aug 2022 14:53:24 -0500
Subject: [PATCH] finished day 2

---
 day2/day2.py      |   49 +++
 day2/example1     |    3 +
 day2/input        | 1000 +++++++++++++++++++++++++++++++++++++++++++++
 day2/test_day2.py |   37 ++
 4 files changed, 1089 insertions(+)
 create mode 100755 day2/day2.py
 create mode 100644 day2/example1
 create mode 100644 day2/input
 create mode 100644 day2/test_day2.py

diff --git a/day2/day2.py b/day2/day2.py
new file mode 100755
index 0000000..8e1c233
--- /dev/null
+++ b/day2/day2.py
@@ -0,0 +1,49 @@
+#! /usr/bin/env python3
+
+import pathlib
+import sys
+import re
+from dataclasses import dataclass
+
+@dataclass
+class PasswordSpec:
+    first:int
+    second:int
+    letter:str
+    password:str
+
+def parse(puzzle_input: str):
+    """Parse input"""
+    regex = re.compile(r'^(\d+)-(\d+) (\w): (\w+)$')
+    toInt = lambda x: PasswordSpec(int(x[0]), int(x[1]), x[2], x[3])
+    return [toInt(regex.match(i).groups()) for i in puzzle_input.splitlines()]
+
+def part1(data):
+    """Solve part 1"""
+    test = lambda x: x.first<=x.password.count(x.letter)<=x.second
+    return sum(1 for p in data if test(p))
+
+def test_password(passwordSpec: PasswordSpec):
+    if passwordSpec.password[passwordSpec.first-1]==passwordSpec.letter:
+        return passwordSpec.password[passwordSpec.second-1]!=passwordSpec.letter
+    else:
+        return passwordSpec.password[passwordSpec.second-1]==passwordSpec.letter
+
+def part2(data):
+    """Solve part 2"""
+    return sum(1 for p in data if test_password(p))
+
+def solve(puzzle_input):
+    """Solve the puzzle for the given input"""
+    data = parse(puzzle_input)
+    solution1 = part1(data)
+    solution2 = part2(data)
+
+    return solution1, solution2
+
+if __name__ == "__main__":
+    for path in sys.argv[1:]:
+        print(f"{path}:")
+        puzzle_input = pathlib.Path(path).read_text().strip()
+        solutions = solve(puzzle_input)
+        print("\n".join(str(solution) for solution in solutions))
diff --git a/day2/example1 b/day2/example1
new file mode 100644
index 0000000..fe19c03
--- /dev/null
+++ b/day2/example1
@@ -0,0 +1,3 @@
+1-3 a: abcde
+1-3 b: cdefg
+2-9 c: ccccccccc
diff --git a/day2/input b/day2/input
new file mode 100644
index 0000000..44339b6
--- /dev/null
+++ b/day2/input
@@ -0,0 +1,1000 @@
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diff --git a/day2/test_day2.py b/day2/test_day2.py
new file mode 100644
index 0000000..03f48ec
--- /dev/null
+++ b/day2/test_day2.py
@@ -0,0 +1,37 @@
+#! /usr/bin/env python3
+
+import pathlib
+import pytest
+import day2 as aoc
+
+PUZZLE_DIR = pathlib.Path(__file__).parent
+
+#these test fixtures setup the test, mainly by reading the filename into a string in this simple case.
+@pytest.fixture
+def example1():
+    puzzle_input = (PUZZLE_DIR / "example1").read_text().strip()
+    return aoc.parse(puzzle_input)
+
+@pytest.fixture
+def example2():
+    puzzle_input = (PUZZLE_DIR / "example2").read_text().strip()
+    return aoc.parse(puzzle_input)
+
+# @pytest.mark.skip(reason="Not implemented")
+def test_parse_example1(example1):
+    """Test that input is parsed properly"""
+    assert example1 == [
+            aoc.PasswordSpec(first=1, second=3, letter='a', password='abcde'),
+            aoc.PasswordSpec(first=1, second=3, letter='b', password='cdefg'),
+            aoc.PasswordSpec(first=2, second=9, letter='c', password='ccccccccc')
+            ]
+
+# @pytest.mark.skip(reason="Not implemented")
+def test_part1_example1(example1):
+    """Test part 1 on example input"""
+    assert aoc.part1(example1) == 2
+
+# @pytest.mark.skip(reason="Not implemented")
+def test_part2_example2(example1):
+    """Test part 2 on example input"""
+    assert aoc.part2(example1) == 1