adrien/Advent-of-Code
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Added day 15

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Adrien Bouvais 2024-12-15 20:39:38 +01:00
parent 8c59c074f4
commit a902e6fc7f
6 changed files with 438 additions and 19 deletions
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46
README.md
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@ -12,24 +12,34 @@ Can be run with `zig run -O ReleaseFast benchmark.zig`
| Day | Part | Mean (μs) | Min (μs) | Max (μs) |
|-----|------|-------------------|----------|----------|
| 1 | 1 | +23 ± 3.74 | +22 | +92 |
| 1 | 2 | +23 ± 2.00 | +22 | +53 |
| 2 | 1 | +34 ± 2.45 | +32 | +83 |
| 2 | 2 | +261 ± 36.08 | +239 | +764 |
| 3 | 1 | +19 ± 1.41 | +18 | +38 |
| 3 | 2 | +18 ± 1.00 | +17 | +44 |
| 4 | 1 | +214 ± 29.29 | +202 | +536 |
| 4 | 2 | +215 ± 29.09 | +201 | +558 |
| 5 | 1 | +139 ± 36.43 | +117 | +540 |
| 5 | 2 | +153 ± 44.35 | +116 | +475 |
| 6 | 1 | +31 ± 2.83 | +28 | +101 |
| 1 | 1 | +25 ± 6.93 | +23 | +67 |
| 1 | 2 | +25 ± 4.69 | +24 | +50 |
| 2 | 1 | +35 ± 3.00 | +33 | +45 |
| 2 | 2 | +266 ± 15.17 | +251 | +329 |
| 3 | 1 | +25 ± 2.45 | +24 | +40 |
| 3 | 2 | +18 ± 2.00 | +17 | +28 |
| 4 | 1 | +217 ± 4.47 | +211 | +232 |
| 4 | 2 | +218 ± 5.10 | +212 | +239 |
| 5 | 1 | +175 ± 50.21 | +131 | +353 |
| 5 | 2 | +141 ± 22.93 | +130 | +252 |
| 6 | 1 | +32 ± 1.73 | +31 | +42 |
| 6 | 2 | Too long ~60s | 0 | 0 |
| 7 | 1 | +182 ± 18.06 | +157 | +439 |
| 7 | 1 | +211 ± 16.19 | +189 | +288 |
| 7 | 2 | Too long ~0.2s | 0 | 0 |
| 8 | 1 | +540 ± 53.40 | +506 | +895 |
| 8 | 2 | +828 ± 81.50 | +769 | +1333 |
| 9 | 1 | +1770 ± 215.91 | +1389 | +5250 |
| 8 | 1 | +511 ± 13.93 | +497 | +581 |
| 8 | 2 | +844 ± 46.60 | +805 | +1095 |
| 9 | 1 | +1514 ± 122.07 | +1307 | +1811 |
| 9 | 2 | Too long ~0.6s | 0 | 0 |
| 10 | 1 | +38 ± 5.66 | +36 | +160 |
| 10 | 2 | +27 ± 2.45 | +27 | +64 |
| Total| | +4515 ± 565.65 | +3898 | +11425 |
| 10 | 1 | +37 ± 7.87 | +35 | +83 |
| 10 | 2 | +28 ± 5.57 | +27 | +62 |
| 11 | 1 | +2139 ± 291.76 | +1931 | +2989 |
| 11 | 2 | +5060 ± 159.47 | +4903 | +5580 |
| 12 | 1 | +44947 ± 1417.02 | +43224 | +49471 |
| 12 | 2 | +48279 ± 2536.03 | +45591 | +57175 |
| 13 | 1 | +1522 ± 119.51 | +1445 | +2178 |
| 13 | 2 | Too long ~6h | 0 | 0 |
| 14 | 1 | +137 ± 5.10 | +130 | +165 |
| 14 | 2 | Need input | 0 | 0 |
| 15 | 1 | +71 ± 41.96 | +42 | +182 |
| 15 | 2 | +200 ± 34.13 | +172 | +301 |
| Total | +106677 ± 4935.90 | +101385 | +123638 |

9
benchmark.zig
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@ -25,6 +25,9 @@ const d112 = @import("day11/part2.zig");
const d121 = @import("day12/part1.zig");
const d122 = @import("day12/part2.zig");
const d131 = @import("day13/part1.zig");
const d141 = @import("day14/part1.zig");
const d151 = @import("day15/part1.zig");
const d152 = @import("day15/part2.zig");
const NUMBER_OF_RUN = 50;
@ -76,6 +79,12 @@ pub fn main() !void {
try benchmark(d131.main, 13, 1);
print("| 13 | 2 | Too long ~6h | 0 | 0 |\n", .{});
separator();
try benchmark(d141.main, 14, 1);
print("| 14 | 2 | Need input | 0 | 0 |\n", .{});
separator();
try benchmark(d151.main, 15, 1);
try benchmark(d152.main, 15, 2);
separator();
print("| Total | {d: >8} ± {d: <6.2} | {d:>8} | {d:>8} |\n", .{ total_mean, total_std_dev, total_min, total_max });
separator();
}

2
day14/part1.zig
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@ -38,7 +38,7 @@ pub fn main() !void {
}
}
print("Total: {d}\n", .{tl_quadrant * tr_quadrant * bl_quadrant * br_quadrant});
try std.testing.expectEqual(218965032, tl_quadrant * tr_quadrant * bl_quadrant * br_quadrant);
}
fn posFinal(x0: Int, y0: Int, vX: Int, vY: Int, mapW: Int, mapH: Int, dt: Int) [2]Int {

71
day15/input Normal file
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@ -0,0 +1,71 @@
##################################################
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#O#...OOOO......O#O#....#OO...O.....O.O.OOO.OOO..#
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#.....O.........O...#.O..O..#OO.O...O.O.#....O...#
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#...........O.....O..OO.......#..#...O...#..O.##O#
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#........#.O##...O#..O..O.#O........O#..OO#.O.O###
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##O.O..O.O...O.....O.O.O.O.OO.#O.O.O..#.....#....#
##.O.......#O.#...O#O#O..O..#O..O....OO.O.O......#
#O...O.O.........O......O.......O......#..O.....##
##################################################
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137
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const std = @import("std");
const print = std.debug.print;
const input = @embedFile("input");
const MAP_SIZE = 50;
const Cell = enum { Empty, Box, Wall, Robot };
const Direction = enum { Top, Bot, Left, Right };
const Position = struct { x: usize, y: usize };
pub fn main() !void {
var map: [MAP_SIZE][MAP_SIZE]Cell = undefined;
var robot_position: Position = undefined;
for (input[0 .. MAP_SIZE * (MAP_SIZE + 1)], 0..) |c, i| {
if (c == '\n') continue;
map[@divFloor(i, MAP_SIZE + 1)][i % (MAP_SIZE + 1)] = switch (c) {
'.' => .Empty,
'#' => .Wall,
'O' => .Box,
'@' => .Robot,
else => unreachable,
};
if (c == '@') robot_position = Position{ .x = @divFloor(i, MAP_SIZE + 1), .y = i % (MAP_SIZE + 1) };
}
for (input[MAP_SIZE * (MAP_SIZE + 1) ..]) |c| switch (c) {
'>' => next(&map, &robot_position, .Right),
'<' => next(&map, &robot_position, .Left),
'^' => next(&map, &robot_position, .Top),
'v' => next(&map, &robot_position, .Bot),
else => {},
};
try std.testing.expectEqual(1487337, calculateSumPosition(map));
}
// The copy paste suck but if I want to use -1 to do dx dy, I need to use something else than usize and it fuck up the indexing
fn next(map: *[MAP_SIZE][MAP_SIZE]Cell, robot_position: *Position, direction: Direction) void {
const x = robot_position.x;
const y = robot_position.y;
switch (direction) {
.Top => switch (map[x - 1][y]) {
.Empty => {
map[x][y] = .Empty;
map[x - 1][y] = .Robot;
robot_position.*.x -= 1;
},
.Wall => {},
.Box => if (detectFirstEmpty(map.*, robot_position.*, direction)) |first_empty| {
map[first_empty.x][first_empty.y] = .Box;
map[x][y] = .Empty;
map[x - 1][y] = .Robot;
robot_position.*.x -= 1;
},
else => unreachable,
},
.Bot => switch (map[x + 1][y]) {
.Empty => {
map[x][y] = .Empty;
map[x + 1][y] = .Robot;
robot_position.*.x += 1;
},
.Wall => {},
.Box => if (detectFirstEmpty(map.*, robot_position.*, direction)) |first_empty| {
map[first_empty.x][first_empty.y] = .Box;
map[x][y] = .Empty;
map[x + 1][y] = .Robot;
robot_position.*.x += 1;
},
else => unreachable,
},
.Left => switch (map[x][y - 1]) {
.Empty => {
map[x][y] = .Empty;
map[x][y - 1] = .Robot;
robot_position.*.y -= 1;
},
.Wall => {},
.Box => if (detectFirstEmpty(map.*, robot_position.*, direction)) |first_empty| {
map[first_empty.x][first_empty.y] = .Box;
map[x][y] = .Empty;
map[x][y - 1] = .Robot;
robot_position.*.y -= 1;
},
else => unreachable,
},
.Right => switch (map[x][y + 1]) {
.Empty => {
map[x][y] = .Empty;
map[x][y + 1] = .Robot;
robot_position.*.y += 1;
},
.Wall => {},
.Box => if (detectFirstEmpty(map.*, robot_position.*, direction)) |first_empty| {
map[first_empty.x][first_empty.y] = .Box;
map[x][y] = .Empty;
map[x][y + 1] = .Robot;
robot_position.*.y += 1;
},
else => unreachable,
},
}
}
fn detectFirstEmpty(map: [MAP_SIZE][MAP_SIZE]Cell, start: Position, direction: Direction) ?Position {
var x = start.x;
var y = start.y;
if (direction == .Top) x -= 1;
if (direction == .Bot) x += 1;
if (direction == .Left) y -= 1;
if (direction == .Right) y += 1;
while (x != 0 and x != MAP_SIZE - 1 and y != 0 and y != MAP_SIZE - 1) : ({
if (direction == .Top) x -= 1;
if (direction == .Bot) x += 1;
if (direction == .Left) y -= 1;
if (direction == .Right) y += 1;
}) {
switch (map[x][y]) {
.Empty => return Position{ .x = x, .y = y },
.Box => continue,
.Wall => return null,
.Robot => unreachable,
}
}
return null;
}
fn calculateSumPosition(map: [MAP_SIZE][MAP_SIZE]Cell) usize {
var total: usize = 0;
for (map, 0..) |row, x| for (row, 0..) |cell, y| switch (cell) {
.Box => total += x * 100 + y,
else => {},
};
return total;
}

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const std = @import("std");
const print = std.debug.print;
const input = @embedFile("input");
const MAPW = 50 * 2;
const MAPH = 50;
const Cell = enum { Empty, BoxL, BoxR, Wall, Robot };
const Direction = enum { Top, Bot, Left, Right };
const Position = struct { x: usize, y: usize };
pub fn main() !void {
var map: [MAPH][MAPW]Cell = undefined;
var robot_position: Position = undefined;
for (input[0 .. MAPH * (MAPH + 1)], 0..) |c, i| {
if (c == '\n') continue;
const x = @divFloor(i, MAPH + 1);
const y = (i % (MAPH + 1)) * 2;
map[x][y] = switch (c) {
'.' => .Empty,
'#' => .Wall,
'O' => .BoxL,
'@' => .Robot,
else => unreachable,
};
map[x][y + 1] = switch (c) {
'.', '@' => .Empty,
'#' => .Wall,
'O' => .BoxR,
else => unreachable,
};
if (c == '@') robot_position = Position{ .x = x, .y = y };
}
for (input[MAPH * (MAPH + 1) ..]) |c| switch (c) {
'>' => next(&map, &robot_position, .Right),
'<' => next(&map, &robot_position, .Left),
'^' => next(&map, &robot_position, .Top),
'v' => next(&map, &robot_position, .Bot),
else => continue,
};
try std.testing.expectEqual(1521952, calculateSumPosition(map));
}
// The copy paste suck but if I want to use -1 to do dx dy, I need to use something else than usize and it fuck up the indexing
fn next(map: *[MAPH][MAPW]Cell, robot_position: *Position, direction: Direction) void {
const x = robot_position.x;
const y = robot_position.y;
switch (direction) {
.Left => switch (map[x][y - 1]) {
.Empty => {
map[x][y] = .Empty;
map[x][y - 1] = .Robot;
robot_position.*.y -= 1;
},
.Wall => {},
.BoxR, .BoxL => if (moveLeftRight(map, robot_position.*, direction)) {
map[x][y - 1] = .Robot;
map[x][y] = .Empty;
robot_position.*.y -= 1;
},
else => unreachable,
},
.Right => switch (map[x][y + 1]) {
.Empty => {
map[x][y] = .Empty;
map[x][y + 1] = .Robot;
robot_position.*.y += 1;
},
.Wall => {},
.BoxR, .BoxL => if (moveLeftRight(map, robot_position.*, direction)) {
map[x][y + 1] = .Robot;
map[x][y] = .Empty;
robot_position.*.y += 1;
},
else => unreachable,
},
.Top => switch (map[x - 1][y]) {
.Empty => {
map[x][y] = .Empty;
map[x - 1][y] = .Robot;
robot_position.*.x -= 1;
},
.Wall => {},
.BoxL, .BoxR => if (moveTopBot(map, robot_position.*, direction)) {
map[x - 1][y] = .Robot;
map[x][y] = .Empty;
robot_position.*.x -= 1;
},
else => unreachable,
},
.Bot => switch (map[x + 1][y]) {
.Empty => {
map[x][y] = .Empty;
map[x + 1][y] = .Robot;
robot_position.*.x += 1;
},
.Wall => {},
.BoxL, .BoxR => if (moveTopBot(map, robot_position.*, direction)) {
map[x + 1][y] = .Robot;
map[x][y] = .Empty;
robot_position.*.x += 1;
},
else => unreachable,
},
}
}
fn moveLeftRight(map: *[MAPH][MAPW]Cell, start: Position, direction: Direction) bool {
if (direction == .Top or direction == .Bot) @panic("Nope");
var y = start.y;
var is_right = direction == .Right;
if (direction == .Left) y -= 1;
if (direction == .Right) y += 1;
while (y != 0 and y != MAPW - 1) : ({
if (direction == .Left) y -= 1;
if (direction == .Right) y += 1;
}) {
switch (map[start.x][y]) {
.Empty => {
while (y != start.y) : ({
if (direction == .Left) y += 1;
if (direction == .Right) y -= 1;
is_right = !is_right;
}) {
map.*[start.x][y] = if (is_right) .BoxR else .BoxL;
}
return true;
},
.BoxR, .BoxL => continue,
.Wall => return false,
.Robot => unreachable,
}
}
return false;
}
fn canMoveTopBot(map: [MAPH][MAPW]Cell, start: Position, direction: Direction) bool {
if (direction == .Right or direction == .Left) @panic("Nope");
var x = start.x;
if (direction == .Top) x -= 1;
if (direction == .Bot) x += 1;
switch (map[x][start.y]) {
.Empty => return true,
.BoxR => return canMoveTopBot(map, Position{ .x = x, .y = start.y }, direction) and canMoveTopBot(map, Position{ .x = x, .y = start.y - 1 }, direction),
.BoxL => return canMoveTopBot(map, Position{ .x = x, .y = start.y }, direction) and canMoveTopBot(map, Position{ .x = x, .y = start.y + 1 }, direction),
.Wall => return false,
.Robot => unreachable,
}
}
fn moveTopBot(map: *[MAPH][MAPW]Cell, start: Position, direction: Direction) bool {
if (direction == .Right or direction == .Left) @panic("Nope");
if (!canMoveTopBot(map.*, start, direction)) return false;
const x = if (direction == .Top) start.x - 1 else start.x + 1;
switch (map[x][start.y]) {
.Empty => return true,
.BoxR => if (moveTopBot(map, Position{ .x = x, .y = start.y }, direction) and moveTopBot(map, Position{ .x = x, .y = start.y - 1 }, direction)) {
map.*[if (direction == .Top) x - 1 else x + 1][start.y] = .BoxR;
map.*[if (direction == .Top) x - 1 else x + 1][start.y - 1] = .BoxL;
map.*[x][start.y] = .Empty;
map.*[x][start.y - 1] = .Empty;
return true;
} else return false,
.BoxL => if (moveTopBot(map, Position{ .x = x, .y = start.y }, direction) and moveTopBot(map, Position{ .x = x, .y = start.y + 1 }, direction)) {
map.*[if (direction == .Top) x - 1 else x + 1][start.y] = .BoxL;
map.*[if (direction == .Top) x - 1 else x + 1][start.y + 1] = .BoxR;
map.*[x][start.y] = .Empty;
map.*[x][start.y + 1] = .Empty;
return true;
} else return false,
.Wall => return false,
.Robot => unreachable,
}
}
fn calculateSumPosition(map: [MAPH][MAPW]Cell) usize {
var total: usize = 0;
for (map, 0..) |row, x| for (row, 0..) |cell, y| switch (cell) {
.BoxL => total += x * 100 + y,
else => {},
};
return total;
}