From d491307031a7aa161e8c00f7fb16600fed5e0c53 Mon Sep 17 00:00:00 2001 From: Scramble Date: Mon, 5 Dec 2022 22:42:03 +0000 Subject: [PATCH] day 5 in zig --- zig/5/input.txt | 512 ++++++++++++++++++++++++++++++++++++++++++++++++ zig/5/part1.zig | 75 +++++++ zig/5/part2.zig | 77 ++++++++ 3 files changed, 664 insertions(+) create mode 100644 zig/5/input.txt create mode 100644 zig/5/part1.zig create mode 100644 zig/5/part2.zig diff --git a/zig/5/input.txt b/zig/5/input.txt new file mode 100644 index 0000000..c1f5fb0 --- /dev/null +++ b/zig/5/input.txt @@ -0,0 +1,512 @@ +[T] [D] [L] +[R] [S] [G] [P] [H] +[G] [H] [W] [R] [L] [P] +[W] [G] [F] [H] [S] [M] [L] +[Q] [V] [B] [J] [H] [N] [R] [N] +[M] [R] [R] [P] [M] [T] [H] [Q] [C] +[F] [F] [Z] [H] [S] [Z] [T] [D] [S] +[P] [H] [P] [Q] [P] [M] [P] [F] [D] + 1 2 3 4 5 6 7 8 9 + +move 3 from 8 to 9 +move 2 from 2 to 8 +move 5 from 4 to 2 +move 7 from 1 to 4 +move 3 from 8 to 2 +move 3 from 2 to 7 +move 1 from 7 to 4 +move 3 from 2 to 9 +move 4 from 7 to 9 +move 1 from 5 to 2 +move 2 from 3 to 4 +move 5 from 9 to 5 +move 6 from 9 to 3 +move 5 from 9 to 5 +move 1 from 9 to 7 +move 2 from 3 to 1 +move 7 from 3 to 9 +move 2 from 7 to 2 +move 5 from 2 to 4 +move 1 from 2 to 9 +move 2 from 1 to 9 +move 7 from 6 to 1 +move 2 from 7 to 3 +move 2 from 3 to 9 +move 1 from 7 to 4 +move 1 from 9 to 2 +move 3 from 1 to 8 +move 2 from 3 to 4 +move 5 from 9 to 2 +move 1 from 3 to 9 +move 8 from 5 to 7 +move 1 from 6 to 1 +move 15 from 4 to 1 +move 4 from 2 to 5 +move 5 from 9 to 7 +move 1 from 9 to 5 +move 5 from 1 to 2 +move 3 from 8 to 9 +move 1 from 7 to 6 +move 11 from 1 to 2 +move 7 from 5 to 3 +move 4 from 2 to 6 +move 7 from 3 to 4 +move 3 from 5 to 9 +move 2 from 2 to 5 +move 5 from 1 to 8 +move 2 from 6 to 8 +move 3 from 8 to 9 +move 9 from 4 to 9 +move 9 from 7 to 4 +move 2 from 8 to 1 +move 1 from 8 to 7 +move 6 from 2 to 7 +move 5 from 2 to 4 +move 5 from 7 to 2 +move 2 from 1 to 7 +move 2 from 6 to 4 +move 7 from 7 to 1 +move 3 from 2 to 6 +move 1 from 8 to 7 +move 2 from 9 to 3 +move 2 from 3 to 1 +move 1 from 2 to 5 +move 4 from 6 to 5 +move 2 from 2 to 3 +move 3 from 5 to 7 +move 1 from 5 to 3 +move 9 from 1 to 7 +move 2 from 9 to 5 +move 13 from 4 to 1 +move 5 from 7 to 2 +move 3 from 3 to 1 +move 2 from 2 to 9 +move 1 from 2 to 7 +move 5 from 5 to 6 +move 2 from 2 to 4 +move 5 from 1 to 3 +move 9 from 7 to 8 +move 2 from 9 to 5 +move 3 from 5 to 4 +move 5 from 9 to 2 +move 10 from 4 to 8 +move 1 from 4 to 1 +move 2 from 8 to 4 +move 4 from 8 to 2 +move 3 from 6 to 8 +move 7 from 8 to 7 +move 10 from 9 to 3 +move 7 from 3 to 2 +move 11 from 2 to 3 +move 13 from 3 to 9 +move 1 from 6 to 3 +move 1 from 1 to 2 +move 1 from 2 to 8 +move 3 from 3 to 4 +move 1 from 2 to 9 +move 1 from 4 to 1 +move 10 from 8 to 3 +move 11 from 9 to 7 +move 1 from 6 to 2 +move 14 from 7 to 1 +move 2 from 2 to 9 +move 4 from 7 to 6 +move 1 from 2 to 4 +move 3 from 4 to 2 +move 4 from 2 to 9 +move 10 from 3 to 4 +move 3 from 6 to 1 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from 2 to 6 +move 4 from 6 to 1 +move 5 from 2 to 8 +move 2 from 9 to 2 +move 1 from 9 to 3 +move 3 from 1 to 8 +move 1 from 3 to 6 +move 7 from 6 to 9 +move 2 from 5 to 4 +move 6 from 7 to 4 +move 4 from 8 to 1 +move 1 from 5 to 2 +move 1 from 6 to 1 +move 7 from 9 to 8 +move 2 from 7 to 9 +move 9 from 2 to 9 +move 5 from 9 to 3 +move 3 from 2 to 8 +move 4 from 8 to 7 +move 9 from 7 to 2 +move 3 from 1 to 3 +move 14 from 8 to 1 +move 2 from 8 to 3 +move 1 from 9 to 4 +move 3 from 7 to 9 +move 8 from 3 to 9 +move 2 from 2 to 7 +move 12 from 1 to 8 +move 4 from 1 to 6 +move 2 from 6 to 7 +move 1 from 6 to 7 +move 9 from 4 to 7 +move 9 from 7 to 4 +move 1 from 1 to 6 +move 2 from 3 to 6 +move 2 from 6 to 8 +move 12 from 9 to 8 +move 2 from 6 to 9 +move 2 from 9 to 7 +move 1 from 8 to 5 +move 5 from 7 to 5 +move 1 from 9 to 1 +move 3 from 4 to 1 +move 5 from 4 to 8 +move 4 from 1 to 7 +move 1 from 4 to 2 +move 19 from 8 to 4 +move 2 from 7 to 5 +move 14 from 8 to 5 +move 2 from 7 to 8 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new file mode 100644 index 0000000..8c4ff07 --- /dev/null +++ b/zig/5/part1.zig @@ -0,0 +1,75 @@ +const std = @import("std"); + +const State = enum { Parse, Move }; + +pub fn main() !void { + var file = try std.fs.cwd().openFile("input.txt", .{}); + defer file.close(); + + var a = std.io.bufferedReader(file.reader()); + var readerStream = a.reader(); + + var gpa = std.heap.GeneralPurposeAllocator(.{}){}; + const allocator = gpa.allocator(); + + const stackCharWidth = 4; + var stackCount: ?u32 = null; + var state = State.Parse; + var stacks = std.ArrayList(std.ArrayList(u8)).init(allocator); + defer { + for (stacks.items) |stack| { + stack.deinit(); + } + stacks.deinit(); + } + + var buf: [200]u8 = undefined; + while (try readerStream.readUntilDelimiterOrEof(&buf, '\n')) |line| { + switch (state) { + State.Parse => { + if (stackCount == null) { + // first iteration - allocate stacks + stackCount = (@intCast(u32, line.len) + 1) / stackCharWidth; + var i: u32 = 0; + while (i < stackCount.?) : (i += 1) { + try stacks.append(std.ArrayList(u8).init(allocator)); + } + } + + if (std.mem.eql(u8, line, "")) { + // done parsing + state = State.Move; + for (stacks.items) |*stack| { + _ = stack.pop(); // the stack's index number that also gets parsed + std.mem.reverse(u8, stack.items); + } + } else { + // parse stacks + for (stacks.items) |*stack, i| { + const charIdx = i * stackCharWidth + 1; + const char = line[charIdx .. charIdx + 1]; + if (char[0] != ' ') try stack.append(char[0]); + } + } + }, + State.Move => { + var tokens = std.mem.split(u8, line, " "); + _ = tokens.next(); // skip "move" + const iterations = try std.fmt.parseInt(u32, tokens.next().?, 10); + _ = tokens.next(); // skip "from" + const src = try std.fmt.parseInt(u32, tokens.next().?, 10) - 1; + _ = tokens.next(); // skip "to" + const dest = try std.fmt.parseInt(u32, tokens.next().?, 10) - 1; + var i: u32 = 0; + while (i < iterations) : (i += 1) { + const tmp = stacks.items[src].pop(); + try stacks.items[dest].append(tmp); + } + }, + } + } + for (stacks.items) |*stack| { + std.debug.print("{c}", .{stack.pop()}); + } + std.debug.print("\n", .{}); +} diff --git a/zig/5/part2.zig b/zig/5/part2.zig new file mode 100644 index 0000000..7cb53fe --- /dev/null +++ b/zig/5/part2.zig @@ -0,0 +1,77 @@ +const std = @import("std"); + +const State = enum { Parse, Move }; + +pub fn main() !void { + var file = try std.fs.cwd().openFile("input.txt", .{}); + defer file.close(); + + var a = std.io.bufferedReader(file.reader()); + var readerStream = a.reader(); + + var gpa = std.heap.GeneralPurposeAllocator(.{}){}; + const allocator = gpa.allocator(); + + const stackCharWidth = 4; + var stackCount: ?u32 = null; + var state = State.Parse; + var stacks = std.ArrayList(std.ArrayList(u8)).init(allocator); + defer { + for (stacks.items) |stack| { + stack.deinit(); + } + stacks.deinit(); + } + + var buf: [200]u8 = undefined; + while (try readerStream.readUntilDelimiterOrEof(&buf, '\n')) |line| { + switch (state) { + State.Parse => { + if (stackCount == null) { + // first iteration - allocate stacks + stackCount = (@intCast(u32, line.len) + 1) / stackCharWidth; + var i: u32 = 0; + while (i < stackCount.?) : (i += 1) { + try stacks.append(std.ArrayList(u8).init(allocator)); + } + } + + if (std.mem.eql(u8, line, "")) { + // done parsing + state = State.Move; + for (stacks.items) |*stack| { + _ = stack.pop(); // the stack's index number that also gets parsed + std.mem.reverse(u8, stack.items); + } + } else { + // parse stacks + for (stacks.items) |*stack, i| { + const charIdx = i * stackCharWidth + 1; + const char = line[charIdx .. charIdx + 1]; + if (char[0] != ' ') try stack.append(char[0]); + } + } + }, + State.Move => { + var tokens = std.mem.split(u8, line, " "); + _ = tokens.next(); // skip "move" + const iterations = try std.fmt.parseInt(u32, tokens.next().?, 10); + _ = tokens.next(); // skip "from" + const src = try std.fmt.parseInt(u32, tokens.next().?, 10) - 1; + _ = tokens.next(); // skip "to" + const dest = try std.fmt.parseInt(u32, tokens.next().?, 10) - 1; + var i: u32 = 0; + while (i < iterations) : (i += 1) { + const tmp = stacks.items[src].pop(); + try stacks.items[dest].append(tmp); + } + const destItems = stacks.items[dest].items; + std.mem.reverse(u8, destItems[destItems.len - iterations ..]); + }, + } + } + for (stacks.items) |*stack| { + std.debug.print("{c}", .{stack.pop()}); + } + std.debug.print("\n", .{}); +}