Initial commit

2024/15/demog

@@ -0,0 +1,6 @@
+#######
+#...O..
+#......
+#...@..
+
+>

2024/15/one.py

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+#!/usr/bin/env python3
+
+import sys
+
+input_file = sys.argv[1]
+
+with open(input_file) as fd:
+    lines = [line.rstrip() for line in fd.readlines()]
+
+coords = tuple[int, int]
+
+pos: coords
+box = list()
+moves: list[coords] = list()
+
+directions = {
+    "^": (-1, 0),  # ^
+    ">": (0, 1),  # >
+    "v": (1, 0),  # v
+    "<": (0, -1),  # <
+}
+
+boxing = True
+for i, line in enumerate(lines):
+    if not line:
+        boxing = False
+    elif boxing:
+        bline = list(line)
+        if "@" in bline:
+            j = bline.index("@")
+            pos = i, j
+            # bline[j] = "."
+        box.append(bline)
+    else:
+        for c in line:
+            direction = directions[c]
+            moves.append(direction)
+
+
+def print_box() -> None:
+    for bline in box:
+        print("".join(bline))
+    print()
+
+
+print_box()
+for move in moves:
+    first = pos[0] + move[0], pos[1] + move[1]
+    last = first
+    possible = True
+    while True:
+        c = box[last[0]][last[1]]
+        # print(c)
+        if c == ".":
+            break
+        elif c == "#":
+            possible = False
+            break
+        last = last[0] + move[0], last[1] + move[1]
+    if possible:
+        if first != last:
+            box[last[0]][last[1]] = "O"
+        box[pos[0]][pos[1]] = "."
+        box[first[0]][first[1]] = "@"
+        pos = first
+    print(move, possible, pos, first, last)
+    print_box()
+
+
+score = 0
+for i, bline in enumerate(box):
+    for j, char in enumerate(bline):
+        if char == "O":
+            score += 100 * i + j
+print(score)

2024/15/two.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python3
+
+import sys
+
+input_file = sys.argv[1]
+
+with open(input_file) as fd:
+    lines = [line.rstrip() for line in fd.readlines()]
+
+vec = tuple[int, int]
+
+pos: vec
+box = list()
+moves: list[vec] = list()
+
+directions = {
+    "^": (-1, 0),  # ^
+    ">": (0, 1),  # >
+    "v": (1, 0),  # v
+    "<": (0, -1),  # <
+}
+
+sub = {
+    "#": "##",
+    "O": "[]",
+    ".": "..",
+    "@": "@.",
+}
+
+boxing = True
+for i, line in enumerate(lines):
+    if not line:
+        boxing = False
+    elif boxing:
+        bline = list()
+        for char in line:
+            bline += list(sub[char])
+        if "@" in bline:
+            j = bline.index("@")
+            pos = i, j
+            # bline[j] = "."
+        box.append(bline)
+    else:
+        for c in line:
+            direction = directions[c]
+            moves.append(direction)
+
+
+def print_box() -> None:
+    for bline in box:
+        print("".join(bline))
+    print()
+
+
+print_box()
+for move in moves:
+
+    def do(i: int, j: int) -> None | set[vec]:
+        ii, jj = i + move[0], j + move[1]
+        char = box[ii][jj]
+        moving = {(i, j)}
+        if char == "#":
+            return None
+        elif char == ".":
+            return moving
+        else:
+            r = do(ii, jj)
+            if r is None:
+                return None
+            moving |= r
+            if char == "[":
+                npos = (ii, jj + 1)
+                if npos not in moving:
+                    r = do(npos[0], npos[1])
+                    if r is None:
+                        return None
+                    moving |= r
+            elif char == "]":
+                npos = (ii, jj - 1)
+                if npos not in moving:
+                    r = do(npos[0], npos[1])
+                    if r is None:
+                        return None
+                    moving |= r
+            return moving
+
+    moving = do(pos[0], pos[1])
+    if moving is None:
+        continue
+    olc: list[str] = list()
+    for i, j in moving:
+        olc.append(box[i][j])
+        box[i][j] = "."
+    print(82, moving)
+    print(83, olc)
+    for i, j in moving:
+        ii, jj = i + move[0], j + move[1]
+        box[ii][jj] = olc.pop(0)
+    # box[pos[0]][pos[1]] = "."
+    pos = pos[0] + move[0], pos[1] + move[1]
+    print(move, pos)
+    # print_box()
+
+
+score = 0
+for i, bline in enumerate(box):
+    for j, char in enumerate(bline):
+        if char == "[":
+            score += 100 * i + j
+print(score)