diff --git a/README.md b/README.md
index d227751..4dacf48 100644
--- a/README.md
+++ b/README.md
@@ -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 |
diff --git a/benchmark.zig b/benchmark.zig
index 71a13ea..497d895 100644
--- a/benchmark.zig
+++ b/benchmark.zig
@@ -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();
 }
diff --git a/day14/part1.zig b/day14/part1.zig
index 52eeb3c..3c74c2c 100644
--- a/day14/part1.zig
+++ b/day14/part1.zig
@@ -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 {
diff --git a/day15/input b/day15/input
new file mode 100644
index 0000000..8c14283
--- /dev/null
+++ b/day15/input
@@ -0,0 +1,71 @@
+##################################################
+#..O.O..#..O.O.O.O.......##O..OOO.....O...O..#..O#
+#.O.O.#.....O..O......O.O.OOO.......OO.O.....#...#
+#OO........O.....OO......##OO.#OO.OO..O....OOO...#
+#......O...O..O.#....O...O.....O..#.O.O.O...#O...#
+#OOO.OO.OO...####O.#O...O..OO...O#.O..#.OO.O...O.#
+#O#...OOOO......O#O#....#OO...O.....O.O.OOO.OOO..#
+#O.O...O.#OO......#...........O...OO.O..O#.#OO...#
+#O.....O.O.O.#...OO..O#....OO.O.O....#.........O.#
+#.O.#O.O#...O#..O.O.#.O.OO..O..O...O.O...OO.O...O#
+#..#..O.#.O..##......OO...........O.....O...#.#..#
+#.OO#.........O...O.....OO.O...OO............O#.O#
+##.O.OO.O...O.O..O..OO.#....O.#....O......OOO...O#
+#..OO..O.O..O..O..O...O..O.....#OO.....O...#OOO.O#
+#.......O.#O.OO..#......O..OO.......O..O.O....OO##
+#.....O.........O...#.O..O..#OO.O...O.O.#....O...#
+#.OO##O#..O.#..O......OO..OO.OO.....O..OO#O.O..O##
+#.O....O...#O.O..O#....O#O...OO.....O....O.......#
+#...OOO....#O.OO...#.OO#O...O#O..#..#.O..O....#..#
+##....O.OO.O#..........O#.OOO.#....#...O#....OO..#
+#.#OOO..OO..O.......#.OO.O..#O.#.OO....OO.O.....O#
+#.O......#..O.#.O..........#O..O.OO...#O...O#....#
+#.#....O.O....O.......O..OOO..OO...OO.#OOO.O.O.#.#
+#.O.#.O.O....OOO...O...O#......OO##.O..OO.....O..#
+#.OO.......#O.OO#..#....@O...O....OOO.O..OO......#
+#O..#..#OO...O#OO.......OO..##..O.#.O.O..O.O..OO.#
+#.#.O.OO.........OO#.O..O.O...OOO.O......O#...OO.#
+#.OO...#..OO.##......O#.O.OO....O..O#.......O.OO##
+#OO..O.O.O....O#.O..O......#...OO#.O..O.O..O..OOO#
+#...OO....OOO.....O..O..O....OO......OOO.........#
+#O...#.....O...O..OO..O.OO....O.O..O....O....O.O.#
+#.....OOOO..#..#.O.OO.......O....OO#.O...O..O..O.#
+##.OO...O.#O......#O.O#O#..O#..O.....O....OO..O.##
+#..O..OOO...OO.OO.#O#.OOO......O...OO...O.O......#
+#.OO.O..O.O.O#..O.#.O.OOO...O..OO.O##.O.#...#...O#
+#........#...O##.....OO....O.O....OO#.O.O.O.#OO.O#
+#.O..O.O.#...O.......#...#..O...O.#.........#..O##
+#...........O.....O..OO.......#..#...O...#..O.##O#
+#.OOO..O..OO....#..OOOO......O...##..#.......O...#
+##..#O..OOO.#O...O..OO...O....OO..#..#.OO.O.OO...#
+##O....#...OO#.O.O...O...O.O..O.......O.....O..#.#
+#........#.O##...O#..O..O.#O........O#..OO#.O.O###
+#....#.O............O..O...OO....OOO...OO...#....#
+#.#O.....#...OO.OO.........#.#.OOO.OO.O...O#.O.#.#
+##....#..OO...O...O..#O..O.O..O.O..O..O.OO.......#
+#...........OO.O.O...O......O...O.OOO.....O..O...#
+##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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+>>>>v<>>v^>^>>^<<v^<<<^<>v<^^<v>^^>^^<^<<v^<<^><>>>v<v>><^^>^<<<^<>^<v<^>>^>v><<^v<<<v^vvv<><><><<<>^<><^v<><v^<>^v<vvv^^<v<v^>v>>v<v^v>vvv<^v^^^^^v>v<^^^vvv<v>^>>>^vv^>><>^>^<>^^v<^v<v^v^><^^^^><^v^><<<>><<<<>^<^>v<<v<<<vv^^<<^>>v>^>><<<<^><^v<>^>^<>^>^<>^<<vv^>^<>vv>^v>>><^<^^v^>>^v>vv>v^^>^<<<<v><vv<<<^v<<vv<<^^<<>^vv><>v^><<v<v><^^><^><<<^^v<<vv><<><>v<<v>^>vv>^<^>^>><<<^><>vv^<>v>v^>^v<<^><<<v<^^^>^v<^^^>><<^v^^<v^^<^>v<v<<vvv<>^<^v<<^<<><>^<><>^^vv<>v<vv>^vv^<^v>v<<v><>^><^>v<<<<^>^>v<vv^>^^<^<>>^v>v>>v<>v>>^>>^<<^^<>><<vv>v^>v>vvv>^^<vv>vv<vv>><>>v>^>v<><^><<^v^>^><>vv<^<>^v>>vv<><^v>>^>v>v^>^^v<>>^^>^^^v<v><>vv^vv^^<<><>^>>v<vv>><^>>v>^<^<>^><v>^<>^v<>v<<<<v>^vvv^<^>v^vv<><<><v<>v<<v>><>v<>v>v<vv>^vv><^<^^v<><<><^^v<<>v<>v<>^><v^v>>v<><vvv^>><<vvv<>^<><^v>^v^v^><>v>vv<>>^^>vvv^vv<<^v<>^v^vv<v>v>>>><v><v^v>^^vv<<>v<^<vv<^>^<vv>^<^<v<>>v^^><^^>>>^v><<v><vv<<>^vv>vv^^^^v><^^v>>v<>vvv>^v>v^<v^>vv><><v<<vv^v>^^v<v>vv^^v^^<^^^vv<^^>>>vv<><<><><><v<<><>>v>^>>^<<>><v^>^<^^^>^><^vv><^<^
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+<>v^^<>>>>v^^>vv>v>v^^^^^vv<v^^v<<>><>^v<>^v>vv^><>v>><><^<^>>^^v^<<^><^>>>>>>>v><vv^^v^>^<>>^vv><vv>v^v>^^<>>><v^<<^<>vvv^><><^<<<^<>^>>>>v^^^>^^^<<>^<v<>v<><^v^^v<><>>^v^>^><<^v^^>v>>>v^>^>><^<^v><^<^^<^>v^^<^v^<^^^><>><^^<<>><^v^v>vvv>vv^<<^vv><<><>vv<>v>^>vv<>v<^^<<vv<^<>v^vvvv><v>^<>^v<^vv<v^v<^^>v^^<<vvv<^v>v><^>>^>^^<>vv<><^<^<^vvv<v^>^<>^<>v>vvv>v<<v><<<<>vv^v<>>^^v>^^v>v<>v>^v>>><<><<^v^^>^^v^^v^v<v>^<v>><v<^>^<>>v^^><v<>v>>^>^<><v><><v^<<^v^v^^^^<v^<vv>>vv<<<><^vv^<^^v>v^^>v<>><><><<>><^<<<^>v<^^^>^^v>vv<^>><><v>>^v><^<>v^>>^^<>^vv>>^^^^v<>><^<><>v>^v<<>^<v<^v^v^>vv>>>>>^>>>vvv<<<<^<<^<>><vv<v<<vv<v>>^<v<<<<^><<>v>v>v>^<<^^^<>^vv<>^v>vv>>>vv^^v<<>vvv^>^<<v>^v>>vvv>><>vvv>>^^v<^^v>^v>vv>>><vvv><vv>>v<<^v^<<<>^^>vv^><^v<>vv<<^<v^^v>^<<v<^>>><^^<v<^v^v^^^<<><^v<>^<<<v>^v><<<^v<vv<v^<v^^vv^<><<<>>^<><>^^v<>v^><><^^>vv^v>v>^v>^<>>vvv^>^vv^><><^^v<<^vv>^^><v>^<v^<v<<vv>^><^<v<<^vvv<><>^>^<^vv<^>vv>vv>^><<<>v<<^vv<>vv<^>>v<>vv^<v>^v<v<>>^<^^v^vv<><>>v>><vv>><v^<><>v^>v^><^^v<>v<^v^>
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diff --git a/day15/part1.zig b/day15/part1.zig
new file mode 100644
index 0000000..61089fd
--- /dev/null
+++ b/day15/part1.zig
@@ -0,0 +1,137 @@
+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;
+}
diff --git a/day15/part2.zig b/day15/part2.zig
new file mode 100644
index 0000000..6b3b58f
--- /dev/null
+++ b/day15/part2.zig
@@ -0,0 +1,192 @@
+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;
+}