Day 10

1 files changed, 27 insertions, 42 deletions

diff --git a/day10/__init__.py b/day10/__init__.py
index e6d385a..740ff08 100644
--- a/day10/__init__.py
+++ b/day10/__init__.py
@@ -11,55 +11,41 @@ class Assignment(BaseAssignment, ABC):
         super().__init__(path)
         self.x_history = {1: 1}
 
-    def addx(self, value: str) -> Iterator[int]:
-        yield 0
-        yield int(value)
-
-    def noop(self) -> Iterator:
-        yield 0
-
-    def x_after(self, cycles: int, instructions: List[str]):
-        try:
-            return self.x_history[cycles]
-        except KeyError:
-            pass
-
-        cycle = 1
+    def parse_instructions(self, instructions: Iterator[str]) -> Iterator[int]:
         x = 1
 
-        while cycle <= cycles and len(instructions) > 0:
-            instruction, *instructions = instructions
+        for instruction in instructions:
             instruction, *args = instruction.split(" ")
 
-            for val in getattr(self, instruction)(*args):
-                x += val
-                cycle += 1
-                self.x_history[cycle] = x
+            yield x
 
-        return self.x_history[cycles]
+            if instruction != "noop":
+                yield x
+                x += int(*args)
 
 
 class AssignmentOne(Assignment):
     example_result = 13140
 
     def run(self, input: Iterator) -> int:
-        instructions = list(input)
-
         return sum(
             [
-                cycles * self.x_after(cycles, instructions)
-                for cycles in [220, 180, 140, 100, 60, 20]
+                cycle * x
+                for cycle, x in enumerate(self.parse_instructions(input), start=1)
+                if cycle in {20, 60, 100, 140, 180, 220}
             ]
         )
 
 
 class AssignmentTwo(Assignment):
-    example_result = """##..##..##..##..##..##..##..##..##..##..
-###...###...###...###...###...###...###.
-####....####....####....####....####....
-#####.....#####.....#####.....#####.....
-######......######......######......####
-#######.......#######.......#######....."""
+    example_result = (
+        "██  ██  ██  ██  ██  ██  ██  ██  ██  ██  \n"
+        "███   ███   ███   ███   ███   ███   ███ \n"
+        "████    ████    ████    ████    ████    \n"
+        "█████     █████     █████     █████     \n"
+        "██████      ██████      ██████      ████\n"
+        "███████       ███████       ███████     "
+    )
 
     def render_pixel(self, row: int, col: int, instructions: List[str]):
         cycle = row * 40 + col
@@ -70,16 +56,15 @@ class AssignmentTwo(Assignment):
         return "."
 
     def run(self, input: Iterator) -> str:
-        instructions = list(input)
+        rows = []
+        row = []
 
-        screen = [
-            [
-                self.render_pixel(row, col, instructions)
-                for col in reversed(range(1, 41))
-            ]
-            for row in reversed(range(6))
-        ]
+        for cycle, x in enumerate(self.parse_instructions(instructions=input), start=1):
+            col = (cycle - 1) % 40
+            row.append("█" if col in {x - 1, x, x + 1} else " ")
 
-        return "\n".join(
-            ["".join(reversed([str(i) for i in row])) for row in reversed(screen)]
-        )
+            if cycle % 40 == 0:
+                rows.append(row)
+                row = []
+
+        return "\n".join("".join(row) for row in rows)