2022-05 in zig

This commit is contained in:
Julien Dessaux 2022-12-05 13:53:59 +01:00
parent c912b3347d
commit f93b2ed7a9
Signed by: adyxax
GPG key ID: F92E51B86E07177E
4 changed files with 647 additions and 0 deletions

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@ -0,0 +1,10 @@
[D]
[N] [C]
[Z] [M] [P]
1 2 3
move 1 from 2 to 1
move 3 from 1 to 3
move 2 from 2 to 1
move 1 from 1 to 2

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const std = @import("std");
const example = @embedFile("example");
const input = @embedFile("input");
pub fn main() anyerror!void {
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
defer arena.deinit();
const allocator = arena.allocator();
var output = try solve(example, allocator);
try std.testing.expect(std.mem.eql(u8, output, "CMZ"));
const result = try solve(input, allocator);
try std.io.getStdOut().writer().print("{s}\n", .{result});
}
fn solve(puzzle: []const u8, allocator: std.mem.Allocator) ![]u8 {
var it = std.mem.tokenize(u8, puzzle, "\n");
var line = it.next() orelse unreachable;
// Initializations from the first line
const size = (line.len + 1) / 4;
var output = try allocator.alloc(u8, size);
var stacks = try allocator.alloc(std.ArrayList(u8), size);
for (stacks) |*stack| {
stack.* = std.ArrayList(u8).init(allocator);
}
// parse stacks
while (true) {
var i: usize = 0;
while (i < size) : (i += 1) {
const v = line[i * 4 + 1];
if (v != ' ') {
try stacks[i].insert(0, v);
}
}
line = it.next() orelse unreachable;
if (line[0] != '[') { // we got the line with numbers
break;
}
}
// process rules
while (it.next()) |l| {
var elts = std.mem.split(u8, l, " ");
_ = elts.next() orelse unreachable; // the move word
var n = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10);
_ = elts.next() orelse unreachable; // the from word
const s = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10) - 1;
_ = elts.next() orelse unreachable; // the to word
const d = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10) - 1;
while (n > 0) : (n -= 1) {
const v = stacks[s].pop();
try stacks[d].append(v);
}
}
// generate output
var i: usize = 0;
while (i < size) : (i += 1) {
output[i] = stacks[i].pop();
}
return output;
}

514
2022/05-supply-stacks/input Normal file
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[N] [C] [Z]
[Q] [G] [V] [S] [V]
[L] [C] [M] [T] [W] [L]
[S] [H] [L] [C] [D] [H] [S]
[C] [V] [F] [D] [D] [B] [Q] [F]
[Z] [T] [Z] [T] [C] [J] [G] [S] [Q]
[P] [P] [C] [W] [W] [F] [W] [J] [C]
[T] [L] [D] [G] [P] [P] [V] [N] [R]
1 2 3 4 5 6 7 8 9
move 6 from 2 to 1
move 4 from 6 to 3
move 1 from 6 to 5
move 8 from 3 to 8
move 13 from 8 to 2
move 2 from 7 to 6
move 10 from 1 to 6
move 3 from 2 to 8
move 5 from 4 to 2
move 15 from 6 to 5
move 1 from 1 to 4
move 2 from 7 to 3
move 2 from 4 to 2
move 12 from 5 to 1
move 4 from 8 to 9
move 15 from 1 to 3
move 10 from 9 to 7
move 1 from 5 to 1
move 1 from 4 to 8
move 3 from 7 to 6
move 8 from 2 to 6
move 1 from 9 to 8
move 5 from 2 to 3
move 1 from 4 to 1
move 16 from 3 to 1
move 2 from 2 to 7
move 13 from 1 to 6
move 1 from 2 to 4
move 2 from 2 to 9
move 1 from 4 to 7
move 2 from 8 to 2
move 2 from 2 to 9
move 1 from 6 to 8
move 2 from 3 to 8
move 2 from 1 to 9
move 1 from 3 to 9
move 1 from 3 to 2
move 5 from 5 to 1
move 2 from 9 to 3
move 1 from 2 to 3
move 2 from 1 to 3
move 3 from 3 to 2
move 1 from 5 to 7
move 2 from 7 to 6
move 2 from 8 to 3
move 1 from 8 to 9
move 6 from 3 to 4
move 3 from 9 to 6
move 8 from 6 to 4
move 1 from 2 to 3
move 1 from 2 to 6
move 1 from 2 to 9
move 1 from 3 to 9
move 5 from 9 to 5
move 7 from 7 to 4
move 14 from 4 to 6
move 1 from 5 to 3
move 5 from 1 to 9
move 4 from 5 to 4
move 1 from 1 to 7
move 1 from 3 to 8
move 1 from 8 to 4
move 4 from 9 to 7
move 6 from 6 to 5
move 10 from 4 to 6
move 1 from 9 to 6
move 1 from 4 to 3
move 1 from 3 to 6
move 1 from 4 to 2
move 35 from 6 to 3
move 1 from 2 to 3
move 4 from 5 to 8
move 2 from 5 to 4
move 3 from 8 to 2
move 2 from 4 to 8
move 26 from 3 to 8
move 3 from 2 to 9
move 6 from 3 to 5
move 3 from 5 to 7
move 3 from 7 to 4
move 3 from 4 to 5
move 1 from 9 to 5
move 6 from 5 to 1
move 2 from 8 to 6
move 11 from 8 to 5
move 9 from 5 to 4
move 1 from 9 to 7
move 2 from 7 to 9
move 3 from 1 to 4
move 1 from 5 to 7
move 8 from 6 to 1
move 5 from 7 to 9
move 7 from 9 to 2
move 3 from 2 to 9
move 3 from 7 to 1
move 4 from 9 to 8
move 2 from 5 to 6
move 2 from 2 to 8
move 2 from 6 to 9
move 13 from 8 to 1
move 1 from 2 to 8
move 3 from 3 to 5
move 1 from 9 to 8
move 3 from 5 to 4
move 1 from 9 to 3
move 1 from 2 to 3
move 4 from 8 to 2
move 3 from 2 to 4
move 19 from 1 to 2
move 8 from 1 to 8
move 1 from 4 to 3
move 1 from 4 to 1
move 7 from 2 to 1
move 1 from 3 to 1
move 2 from 3 to 1
move 15 from 4 to 5
move 1 from 1 to 7
move 11 from 2 to 8
move 2 from 2 to 9
move 1 from 3 to 5
move 2 from 9 to 4
move 12 from 8 to 3
move 16 from 5 to 1
move 3 from 4 to 3
move 1 from 7 to 5
move 2 from 8 to 6
move 1 from 5 to 4
move 1 from 4 to 9
move 18 from 1 to 9
move 8 from 3 to 8
move 9 from 8 to 2
move 4 from 9 to 2
move 8 from 1 to 2
move 2 from 6 to 4
move 17 from 2 to 1
move 1 from 4 to 5
move 3 from 2 to 6
move 1 from 2 to 9
move 2 from 6 to 1
move 3 from 3 to 6
move 1 from 4 to 6
move 2 from 3 to 2
move 16 from 9 to 5
move 14 from 5 to 4
move 3 from 5 to 8
move 1 from 2 to 4
move 4 from 8 to 6
move 1 from 2 to 8
move 1 from 3 to 9
move 1 from 3 to 9
move 2 from 9 to 1
move 10 from 8 to 7
move 7 from 6 to 9
move 16 from 1 to 5
move 7 from 4 to 3
move 1 from 8 to 4
move 5 from 4 to 2
move 1 from 5 to 9
move 5 from 9 to 1
move 5 from 1 to 2
move 2 from 9 to 7
move 1 from 1 to 7
move 1 from 6 to 8
move 4 from 4 to 5
move 1 from 6 to 9
move 9 from 2 to 1
move 11 from 5 to 6
move 2 from 9 to 2
move 4 from 3 to 4
move 4 from 4 to 6
move 1 from 3 to 4
move 11 from 7 to 4
move 9 from 4 to 7
move 11 from 7 to 2
move 2 from 3 to 5
move 2 from 4 to 8
move 7 from 5 to 2
move 1 from 8 to 3
move 1 from 5 to 1
move 1 from 3 to 7
move 6 from 2 to 9
move 1 from 8 to 9
move 6 from 9 to 2
move 15 from 6 to 2
move 1 from 7 to 2
move 31 from 2 to 7
move 22 from 7 to 3
move 2 from 5 to 1
move 3 from 7 to 4
move 1 from 4 to 9
move 3 from 4 to 3
move 1 from 8 to 6
move 1 from 9 to 6
move 15 from 1 to 5
move 1 from 9 to 5
move 1 from 1 to 8
move 2 from 6 to 8
move 1 from 8 to 4
move 1 from 4 to 6
move 1 from 6 to 9
move 10 from 3 to 1
move 1 from 9 to 7
move 2 from 7 to 8
move 10 from 5 to 1
move 12 from 1 to 4
move 1 from 3 to 8
move 11 from 4 to 8
move 1 from 8 to 3
move 5 from 5 to 8
move 1 from 5 to 8
move 6 from 8 to 6
move 3 from 2 to 1
move 1 from 6 to 2
move 5 from 1 to 6
move 3 from 1 to 4
move 3 from 2 to 8
move 1 from 2 to 9
move 8 from 3 to 5
move 2 from 1 to 3
move 3 from 7 to 5
move 2 from 3 to 5
move 3 from 5 to 2
move 1 from 7 to 9
move 2 from 9 to 1
move 1 from 6 to 9
move 2 from 4 to 8
move 5 from 6 to 5
move 1 from 6 to 7
move 1 from 9 to 8
move 3 from 6 to 5
move 7 from 8 to 9
move 5 from 9 to 1
move 2 from 4 to 8
move 11 from 5 to 9
move 3 from 2 to 3
move 2 from 5 to 8
move 4 from 3 to 7
move 11 from 9 to 5
move 3 from 7 to 5
move 1 from 3 to 5
move 8 from 1 to 4
move 5 from 3 to 9
move 15 from 5 to 4
move 8 from 4 to 1
move 12 from 8 to 1
move 4 from 5 to 8
move 12 from 4 to 5
move 3 from 7 to 2
move 11 from 5 to 7
move 8 from 8 to 7
move 7 from 9 to 8
move 2 from 5 to 7
move 4 from 7 to 8
move 9 from 8 to 4
move 11 from 4 to 5
move 6 from 7 to 8
move 9 from 8 to 7
move 18 from 7 to 5
move 1 from 8 to 1
move 4 from 1 to 5
move 1 from 7 to 2
move 6 from 1 to 9
move 1 from 2 to 4
move 1 from 4 to 3
move 3 from 1 to 7
move 1 from 4 to 2
move 3 from 2 to 5
move 2 from 9 to 5
move 1 from 2 to 6
move 4 from 7 to 8
move 1 from 6 to 2
move 1 from 2 to 4
move 4 from 8 to 5
move 3 from 9 to 7
move 1 from 9 to 5
move 1 from 4 to 3
move 2 from 3 to 8
move 2 from 7 to 4
move 28 from 5 to 8
move 1 from 8 to 9
move 1 from 9 to 3
move 6 from 5 to 6
move 5 from 5 to 2
move 1 from 3 to 4
move 1 from 7 to 4
move 1 from 5 to 6
move 16 from 8 to 3
move 7 from 1 to 8
move 4 from 4 to 9
move 1 from 2 to 4
move 3 from 2 to 3
move 6 from 6 to 8
move 10 from 3 to 8
move 1 from 2 to 7
move 1 from 6 to 7
move 11 from 8 to 5
move 2 from 7 to 8
move 1 from 1 to 9
move 5 from 9 to 5
move 4 from 3 to 2
move 1 from 4 to 2
move 1 from 3 to 8
move 3 from 8 to 2
move 19 from 8 to 7
move 6 from 7 to 6
move 4 from 5 to 2
move 9 from 7 to 5
move 1 from 7 to 1
move 5 from 6 to 9
move 1 from 7 to 4
move 1 from 6 to 7
move 1 from 4 to 7
move 1 from 1 to 2
move 2 from 7 to 3
move 6 from 5 to 9
move 9 from 9 to 1
move 17 from 5 to 4
move 2 from 3 to 1
move 13 from 4 to 7
move 3 from 3 to 5
move 7 from 1 to 4
move 1 from 5 to 8
move 2 from 5 to 2
move 6 from 7 to 3
move 1 from 5 to 7
move 1 from 9 to 1
move 2 from 3 to 2
move 1 from 9 to 3
move 9 from 7 to 3
move 10 from 3 to 5
move 8 from 4 to 2
move 1 from 4 to 1
move 13 from 2 to 4
move 5 from 4 to 3
move 1 from 5 to 9
move 1 from 7 to 2
move 6 from 4 to 2
move 4 from 1 to 8
move 3 from 4 to 6
move 9 from 8 to 9
move 17 from 2 to 3
move 2 from 8 to 6
move 1 from 4 to 3
move 2 from 6 to 3
move 2 from 1 to 3
move 13 from 3 to 4
move 8 from 9 to 8
move 7 from 4 to 6
move 3 from 5 to 6
move 5 from 8 to 2
move 9 from 6 to 1
move 7 from 2 to 4
move 2 from 6 to 9
move 1 from 1 to 5
move 18 from 3 to 8
move 5 from 1 to 3
move 1 from 6 to 1
move 9 from 4 to 7
move 11 from 8 to 7
move 5 from 7 to 5
move 2 from 4 to 5
move 1 from 6 to 2
move 13 from 7 to 8
move 1 from 4 to 9
move 1 from 9 to 6
move 4 from 1 to 5
move 1 from 7 to 6
move 9 from 5 to 7
move 8 from 5 to 6
move 10 from 7 to 2
move 1 from 5 to 7
move 1 from 7 to 1
move 17 from 8 to 2
move 9 from 6 to 7
move 6 from 7 to 1
move 2 from 7 to 2
move 1 from 4 to 2
move 12 from 2 to 8
move 7 from 1 to 2
move 6 from 8 to 6
move 3 from 8 to 2
move 1 from 7 to 2
move 2 from 3 to 4
move 1 from 4 to 9
move 2 from 3 to 5
move 2 from 3 to 7
move 1 from 4 to 6
move 2 from 7 to 1
move 7 from 2 to 7
move 6 from 7 to 1
move 1 from 5 to 2
move 6 from 8 to 4
move 4 from 9 to 7
move 1 from 5 to 2
move 3 from 8 to 1
move 1 from 9 to 4
move 1 from 7 to 8
move 1 from 8 to 1
move 4 from 7 to 8
move 1 from 4 to 2
move 3 from 6 to 9
move 2 from 9 to 7
move 1 from 9 to 3
move 2 from 4 to 3
move 2 from 8 to 3
move 5 from 3 to 4
move 4 from 6 to 2
move 8 from 2 to 9
move 1 from 6 to 5
move 10 from 2 to 3
move 2 from 8 to 3
move 8 from 9 to 3
move 9 from 2 to 5
move 1 from 2 to 4
move 1 from 2 to 3
move 7 from 5 to 6
move 1 from 5 to 7
move 13 from 3 to 4
move 2 from 7 to 8
move 5 from 3 to 1
move 1 from 5 to 3
move 1 from 8 to 5
move 1 from 2 to 8
move 1 from 7 to 9
move 1 from 4 to 2
move 15 from 4 to 8
move 6 from 4 to 7
move 6 from 7 to 8
move 1 from 6 to 5
move 1 from 4 to 6
move 1 from 9 to 6
move 2 from 5 to 2
move 6 from 6 to 4
move 6 from 1 to 8
move 6 from 4 to 9
move 2 from 6 to 1
move 1 from 2 to 9
move 26 from 8 to 1
move 4 from 3 to 7
move 2 from 2 to 5
move 16 from 1 to 4
move 3 from 9 to 8
move 3 from 8 to 7
move 3 from 5 to 1
move 2 from 9 to 2
move 1 from 9 to 7
move 1 from 9 to 1
move 8 from 4 to 1
move 4 from 4 to 9
move 1 from 2 to 3
move 1 from 3 to 7
move 2 from 8 to 2
move 3 from 4 to 2
move 1 from 4 to 7
move 9 from 7 to 5
move 1 from 9 to 8
move 2 from 9 to 8
move 5 from 5 to 7
move 1 from 9 to 5
move 6 from 2 to 6
move 1 from 8 to 2
move 5 from 6 to 5
move 1 from 7 to 4
move 3 from 8 to 9
move 3 from 9 to 7
move 1 from 6 to 4
move 2 from 4 to 1
move 2 from 5 to 8
move 1 from 2 to 9
move 2 from 8 to 9
move 3 from 9 to 3
move 8 from 7 to 3
move 4 from 5 to 8
move 1 from 3 to 9
move 3 from 5 to 8
move 1 from 5 to 3
move 6 from 8 to 6
move 3 from 3 to 9
move 5 from 3 to 2
move 5 from 6 to 4
move 14 from 1 to 5
move 8 from 5 to 6
move 2 from 3 to 2
move 4 from 9 to 1
move 1 from 8 to 7
move 7 from 2 to 3
move 6 from 3 to 7
move 3 from 5 to 3
move 1 from 3 to 9
move 12 from 1 to 5
move 1 from 9 to 7
move 2 from 3 to 1
move 1 from 7 to 8
move 1 from 8 to 7
move 2 from 3 to 6
move 2 from 1 to 9
move 2 from 5 to 6
move 2 from 9 to 7
move 9 from 7 to 3
move 7 from 1 to 5
move 5 from 5 to 2
move 8 from 6 to 8
move 5 from 8 to 9

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const std = @import("std");
const example = @embedFile("example");
const input = @embedFile("input");
pub fn main() anyerror!void {
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
defer arena.deinit();
const allocator = arena.allocator();
var output = try solve(example, allocator);
try std.testing.expect(std.mem.eql(u8, output, "MCD"));
const result = try solve(input, allocator);
try std.io.getStdOut().writer().print("{s}\n", .{result});
}
fn solve(puzzle: []const u8, allocator: std.mem.Allocator) ![]u8 {
var it = std.mem.tokenize(u8, puzzle, "\n");
var line = it.next() orelse unreachable;
// Initializations from the first line
const size = (line.len + 1) / 4;
var output = try allocator.alloc(u8, size);
var stacks = try allocator.alloc(std.ArrayList(u8), size);
for (stacks) |*stack| {
stack.* = std.ArrayList(u8).init(allocator);
}
// parse stacks
while (true) {
var i: usize = 0;
while (i < size) : (i += 1) {
const v = line[i * 4 + 1];
if (v != ' ') {
try stacks[i].insert(0, v);
}
}
line = it.next() orelse unreachable;
if (line[0] != '[') { // we got the line with numbers
break;
}
}
// process rules
while (it.next()) |l| {
var elts = std.mem.split(u8, l, " ");
_ = elts.next() orelse unreachable; // the move word
var n = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10);
_ = elts.next() orelse unreachable; // the from word
const s = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10) - 1;
_ = elts.next() orelse unreachable; // the to word
const d = try std.fmt.parseInt(u8, elts.next() orelse unreachable, 10) - 1;
const nl = stacks[s].items.len - n;
try stacks[d].appendSlice(stacks[s].items[nl..]);
stacks[s].items.len = nl;
}
// generate output
var i: usize = 0;
while (i < size) : (i += 1) {
output[i] = stacks[i].pop();
}
return output;
}