Added day 3

1 files changed, 43 insertions, 0 deletions

diff --git a/day3/__init__.py b/day3/__init__.py
new file mode 100644
index 0000000..4954c15
--- /dev/null
+++ b/day3/__init__.py
@@ -0,0 +1,43 @@
+from functools import reduce
+from typing import List, Generator
+
+from aoc import BaseAssignment
+
+
+class Assignment(BaseAssignment):
+    def read_input(self, example = False) -> List:
+        return list(super().read_input(example))
+
+    def slope(self, input: List, dx: int, dy: int) -> Generator:
+        for y, row in enumerate(input[::dy]):
+            x = (y * dx) % len(row)
+            yield (x, y)
+
+    def get_trees_for_slope(self, input: List, dx: int, dy: int):
+        trees = 0
+
+        for x, y in self.slope(input, dx, dy):
+            if x == 0 and y == 0:
+                continue
+
+            if (input[y * dy][x]) == '#':
+                trees += 1
+
+        return trees
+
+
+
+class AssignmentOne(Assignment):
+    def run(self, input: List):
+        return self.get_trees_for_slope(input, 3, 1)
+
+class AssignmentTwo(Assignment):
+    def run(self, input: List):
+        return reduce(lambda accumulator, value: accumulator * value, [
+            self.get_trees_for_slope(input, 1, 1),
+            self.get_trees_for_slope(input, 3, 1),
+            self.get_trees_for_slope(input, 5, 1),
+            self.get_trees_for_slope(input, 7, 1),
+            self.get_trees_for_slope(input, 1, 2),
+        ])
+