Start day 22.

2022/day20.py

@@ -1,5 +1,7 @@
 # -*- encoding: utf-8 -*-
 
+from __future__ import annotations
+
 import sys
 
 

2022/day22.py

@@ -1,3 +1,38 @@
 # -*- encoding: utf-8 -*-
 
+import re
 import sys
+
+import numpy as np
+
+EMPTY = 0
+VOID = 1
+WALL = 2
+TILE_FROM_CHAR = {" ": VOID, ".": EMPTY, "#": WALL}
+
+
+board_map_s, direction_s = sys.stdin.read().split("\n\n")
+
+# board
+board_lines = board_map_s.splitlines()
+max_line = max(len(line) for line in board_lines)
+board_map = np.array(
+    [
+        [TILE_FROM_CHAR[c] for c in row] + [VOID] * (max_line - len(row))
+        for row in board_map_s.splitlines()
+    ]
+)
+
+directions = [
+    int(p1) if p2 else p1 for p1, p2 in re.findall(R"(([0-9])+|L|R)", direction_s)
+]
+
+y0 = 0
+x0 = np.where(board_map[0] == EMPTY)[0][0]
+r0 = "R"
+print(y0, x0)
+
+for direction in directions:
+    if isinstance(direction, int):
+        if r0 == "R":
+            x0 = np.argmax(board_map[y0, x0 + 1 :])

2022/tests/day22.txt

@@ -0,0 +1,14 @@
+        ...#
+        .#..
+        #...
+        ....
+...#.......#
+........#...
+..#....#....
+..........#.
+        ...#....
+        .....#..
+        .#......
+        ......#.
+
+10R5L5R10L4R5L5