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const std = @import("std");
const data = @embedFile("day05");
const Stack = std.BoundedArray(u8, 64);
pub fn main() !void {
var lines = std.mem.split(u8, data, "\n");
var stacks = [_]Stack{try Stack.init(0)} ** 9;
while (lines.next()) |line| {
if (line.len == 0)
break;
for (stacks) |*stack, j| {
var c = line[1 + (j * 4)];
if (c != ' ') {
try stack.append(c);
}
}
}
for (stacks) |*stack| {
std.mem.reverse(u8, stack.slice());
}
var stacks2 = stacks;
while (lines.next()) |line| {
if (line.len == 0)
break;
var parts = std.mem.tokenize(u8, line, " ");
_ = parts.next();
var n = try std.fmt.parseInt(usize, parts.next().?, 10);
_ = parts.next();
var from = try std.fmt.parseInt(usize, parts.next().?, 10) - 1;
_ = parts.next();
var to = try std.fmt.parseInt(usize, parts.next().?, 10) - 1;
var j: usize = 0;
while (j < n) : (j += 1) {
try stacks[to].append(stacks[from].pop());
}
var f = stacks2[from].slice();
try stacks2[to].appendSlice(f[f.len - n .. f.len]);
try stacks2[from].resize(f.len - n);
}
for (stacks) |*stack| {
std.debug.print("{c}", .{stack.pop()});
}
std.debug.print("\n", .{});
for (stacks2) |*stack| {
std.debug.print("{c}", .{stack.pop()});
}
std.debug.print("\n", .{});
}
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