Day 10 part 1 completed

.gitignore

@@ -3,3 +3,4 @@ cookies.txt
 **/input
 __pycache__
 .venv
+toy_input

day10/common.py

@@ -0,0 +1,19 @@
+from typing import TypeAlias
+from enum import Enum
+
+class Operation(Enum):
+    NOOP = 'noop'
+    ADDX = 'addx'
+
+Instruction: TypeAlias = tuple[Operation, int|None]
+
+def parse(filename: str) -> list[Instruction]:
+    instructions = []
+    with open(filename) as f:
+        while line:=f.readline().strip("\n"):
+            oper = line.split()
+            if len(oper) > 1:
+                instructions.append((Operation(oper[0]), int(oper[1])))
+            else:
+                instructions.append((Operation(oper[0]), None))
+    return instructions

day10/part1.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+from common import parse, Operation, Instruction
+
+def tick(instruction: Instruction, clock: int, x: int) -> tuple[int,int]:
+    match instruction[0]:
+        case Operation.NOOP:
+            return clock+1, x
+        case Operation.ADDX:
+            return clock+2, x+ instruction[1]
+
+def solve(input: list[Instruction])->int:
+    clock = 0
+    x = 1
+    current_x = x
+    important_ticks = [20,60,100,140,180,220]
+    signal_strengths = []
+    for instruction in input:
+        clock, x = tick(instruction, clock, x)
+        if important_ticks != [] and clock >= important_ticks[0]:
+            print(important_ticks[0], current_x)
+            signal_strengths.append(current_x * important_ticks.pop(0))
+        current_x = x
+    print(signal_strengths)
+    return sum(signal_strengths)
+
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day3/toy_input

@@ -1,6 +0,0 @@
-vJrwpWtwJgWrhcsFMMfFFhFp
-jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL
-PmmdzqPrVvPwwTWBwg
-wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn
-ttgJtRGJQctTZtZT
-CrZsJsPPZsGzwwsLwLmpwMDw

day4/toy_input

@@ -1,6 +0,0 @@
-2-4,6-8
-2-3,4-5
-5-7,7-9
-2-8,3-7
-6-6,4-6
-2-6,4-8

day5/common.py

@@ -0,0 +1,54 @@
+import re
+from copy import deepcopy
+
+
+def parse(filename: str) -> tuple[list[list[str]], list[tuple[int, int, int]]]:
+    stacks_of_crates = []
+    operations = []
+    finalised_stacks = False
+    with open(filename) as f:
+        while not finalised_stacks:
+            row = f.readline()[:-1]
+            if re.match(r"(\s{3}|\[.\])\s?", row):
+                crates = []
+                while row != "":
+                    crate = row[0:3]
+                    crates.append(crate[1])
+                    row = row[4:]
+                for idx, crate in enumerate(crates):
+                    if crate != " ":
+                        if idx < len(stacks_of_crates):
+                            stacks_of_crates[idx].append(crate)
+                        else:
+                            stacks_of_crates.append([crate])
+                    else:
+                        if idx >= len(stacks_of_crates):
+                            stacks_of_crates.append([])
+            else:
+                finalised_stacks = True
+                numbers = re.findall(r" \d ", row)
+                last = int(numbers[len(numbers) - 1])
+                assert last == len(stacks_of_crates)
+        f.readline()
+        while line := f.readline():
+            if match := re.match(r"move (\d+) from (\d) to (\d)", line):
+                operations.append((int(match.group(1)), int(match.group(2)), int(match.group(3))))
+    return list(map(lambda x: list(reversed(x)), stacks_of_crates)), operations
+
+
+def pretty_print(stacks: list[list[str]]) -> None:
+    max_len = max(map(len, stacks))
+    the_stacks = deepcopy(stacks)
+    for idx, stack in enumerate(the_stacks):
+        for i in range(max_len - len(stack)):
+            the_stacks[idx].append(" ")
+    for i in range(max_len):
+        for j in range(len(the_stacks)):
+            char = the_stacks[j].pop()
+            if char != " ":
+                print(f"[{char}]", end=" ")
+            else:
+                print("   ", end=" ")
+        print("")
+    print("".join([f" {a}  " for a in range(1, len(the_stacks) + 1)]))
+    pass

day5/part1.py

@@ -0,0 +1,26 @@
+from common import parse  # , pretty_print
+
+
+def move(stacks: list[list[str]], operation: tuple[int, int, int]) -> list[list[str]]:
+    # print(f"move {operation[0]} from {operation[1]} to {operation[2]}")
+    for i in range(operation[0]):
+        num = stacks[operation[1] - 1].pop()
+        stacks[operation[2] - 1].append(num)
+    return stacks
+
+
+def solve(input: tuple[list[list[str]], list[tuple[int, int, int]]]) -> str:
+    stacks, operations = input
+    # pretty_print(stacks)
+    for operation in operations:
+        stacks = move(stacks, operation)
+        # pretty_print(stacks)
+    return "".join(map(lambda x: x[len(x) - 1] if len(x) != 0 else "", stacks))
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day5/part2.py

@@ -0,0 +1,27 @@
+from common import parse  # , pretty_print
+
+
+def move(stacks: list[list[str]], operation: tuple[int, int, int]) -> list[list[str]]:
+    # print(f"move {operation[0]} from {operation[1]} to {operation[2]}")
+    dst = operation[2] - 1
+    orig = operation[1] - 1
+    stacks[dst] += stacks[orig][len(stacks[orig]) - operation[0] : len(stacks[orig])]
+    stacks[orig] = stacks[orig][: len(stacks[orig]) - operation[0]]
+    return stacks
+
+
+def solve(input: tuple[list[list[str]], list[tuple[int, int, int]]]) -> str:
+    stacks, operations = input
+    # pretty_print(stacks)
+    for operation in operations:
+        stacks = move(stacks, operation)
+        # pretty_print(stacks)
+    return "".join(map(lambda x: x[len(x) - 1] if len(x) != 0 else "", stacks))
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day6/common.py

@@ -0,0 +1,3 @@
+def parse(filename: str):
+    with open(filename) as f:
+        return f.readline()[:-1]

day6/part1.py

@@ -0,0 +1,20 @@
+from common import parse
+
+
+def all_different_characters(input: str) -> bool:
+    return all(map(lambda c: input.count(c) == 1, input))
+
+
+def solve(input: str) -> int:
+    i = 0
+    while i < len(input) and not all_different_characters(input[i : i + 4]):
+        i += 1
+    return i + 4
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day6/part2.py

@@ -0,0 +1,20 @@
+from common import parse
+
+
+def all_different_characters(input: str) -> bool:
+    return all(map(lambda c: input.count(c) == 1, input))
+
+
+def solve(input: str) -> int:
+    i = 0
+    while i < len(input) and not all_different_characters(input[i : i + 14]):
+        i += 1
+    return i + 14
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day7/common.py

@@ -0,0 +1,71 @@
+from __future__ import annotations
+
+import re
+from dataclasses import dataclass
+
+
+@dataclass
+class File:
+    name: str
+    size: int
+
+    def __equals__(self, other):
+        return self.name == other.name and self.size == other.size
+
+
+@dataclass
+class Folder:
+    name: str
+    parent: Folder | None
+    children: list[Folder | File]
+
+    def __equals__(self, other):
+        return self.name == other.name and self.parent == other.parent
+
+    @property
+    def full_name(self):
+        if self.parent is None:
+            return "/"
+        else:
+            return self.parent.full_name + f"/{self.name}"
+
+    @property
+    def size(self):
+        return sum(map(lambda x: x.size, self.children))
+
+    def __lt__(self, other):
+        return self.size < other.size
+
+
+def pretty_print(folder: Folder, depth: int = 0) -> None:
+    print("".join([" " for i in range(depth + 1)]), end="- ")
+    print(f"{folder.name} (dir)")
+    for object in folder.children:
+        if type(object) is Folder:
+            pretty_print(object, depth + 1)
+        else:
+            print("".join([" " for i in range(depth + 2)]), end="- ")
+            print(f"{object.name} (file, size={object.size})")
+
+
+def parse(filename: str) -> Folder:
+    filesystem = Folder(name="/", parent=None, children=[])
+    with open(filename) as f:
+        f.readline()
+        current = filesystem
+        while line := f.readline()[:-1]:
+            if line[0] == "$":
+                if match := re.match(r"\$ cd (.+)", line):
+                    folder_name = match.group(1)
+                    if folder_name != "..":
+                        current = filter(lambda x: x.name == folder_name, current.children).__next__()
+                    else:
+                        current = current.parent
+            else:
+                if match := re.match(r"(\d+) ((?:\w|.)+)", line):
+                    fichier = File(name=match.group(2), size=int(match.group(1)))
+                    current.children.append(fichier)
+                elif match := re.match(r"dir (\w+)", line):
+                    folder = Folder(name=match.group(1), parent=current, children=[])
+                    current.children.append(folder)
+    return filesystem

day7/part1.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+from common import Folder, parse
+
+
+def solve(folder: Folder) -> int:
+    childrens_sizes = sum(map(lambda x: solve(x), filter(lambda y: type(y) is Folder, folder.children)))
+    if folder.size >= 100000:
+        return childrens_sizes
+    else:
+        return folder.size + childrens_sizes
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day7/part2.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+from common import Folder, parse
+
+
+def folders_big_enough(folder: Folder, threshold: int) -> list[Folder]:
+    if folder.size < threshold:
+        return []
+    else:
+        folder_list = [folder]
+        for child in filter(lambda x: type(x) is Folder, folder.children):
+            folder_list += folders_big_enough(child, threshold)
+        return folder_list
+
+
+def solve(folder: Folder) -> int:
+    threshold = 30000000 - (70000000 - folder.size)
+    return min(sorted(folders_big_enough(folder, threshold))).size
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day8/common.py

@@ -0,0 +1,3 @@
+def parse(filename: str) -> list[list[int]]:
+    with open(filename) as f:
+        return [[int(i) for i in line.strip("\n")] for line in f.readlines()]

day8/part1.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+from common import parse
+
+
+def is_visible(forest: list[list[int]], x: int, y: int) -> bool:
+    height = forest[y][x]
+    west = forest[y][0:x]
+    east = forest[y][x + 1 :]
+    north = [forest[i][x] for i in range(y)]
+    south = [forest[i][x] for i in range(y + 1, len(forest))]
+    return any(map(lambda x: x == [] or max(x) < height, (west, east, north, south)))
+
+
+def solve(input: list[list[int]]) -> int:
+    count = 0
+    for y, line in enumerate(input):
+        for x, tree in enumerate(line):
+            count += 1 if is_visible(input, x, y) else 0
+    return count
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

day8/part2.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+from common import parse
+
+
+def scenic_score(forest: list[list[int]], x: int, y: int) -> int:
+    height = forest[y][x]
+    sw = se = sn = ss = 0
+    west = reversed(forest[y][0:x])
+    for w in west:
+        if w < height:
+            sw += 1
+            continue
+        elif w == height:
+            sw += 1
+        break
+    east = forest[y][x + 1 :]
+    for e in east:
+        if e < height:
+            se += 1
+            continue
+        elif e == height:
+            se += 1
+        break
+    north = reversed([forest[i][x] for i in range(y)])
+    for n in north:
+        if n < height:
+            sn += 1
+            continue
+        elif n == height:
+            sn += 1
+        break
+    south = [forest[i][x] for i in range(y + 1, len(forest))]
+    for s in south:
+        if s < height:
+            ss += 1
+            continue
+        elif s == height:
+            ss += 1
+        break
+
+    return sw * se * sn * ss
+
+
+def solve(input: list[list[int]]) -> int:
+    maxi = 0
+    for y, line in enumerate(input):
+        for x, tree in enumerate(input):
+            maxi = max(maxi, scenic_score(input, x, y))
+    return maxi
+
+
+def main():
+    print(solve(parse("input")))
+
+
+if __name__ == "__main__":
+    main()

template/part1.py

@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from common import parse