Update for 2021

.gitignore

@@ -1,2 +1,3 @@
 zig-cache/
+zig-out/
 build_runner.zig

.vscode/launch.json

@@ -8,7 +8,7 @@
             "name": "day 01",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day01.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day01.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -20,7 +20,7 @@
             "name": "day 02",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day02.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day02.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -32,7 +32,7 @@
             "name": "day 03",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day03.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day03.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -44,7 +44,7 @@
             "name": "day 04",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day04.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day04.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -56,7 +56,7 @@
             "name": "day 05",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day05.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day05.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -68,7 +68,7 @@
             "name": "day 06",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day06.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day06.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -80,7 +80,7 @@
             "name": "day 07",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day07.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day07.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -92,7 +92,7 @@
             "name": "day 08",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day08.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day08.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -104,7 +104,7 @@
             "name": "day 09",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day09.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day09.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -116,7 +116,7 @@
             "name": "day 10",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day10.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day10.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -128,7 +128,7 @@
             "name": "day 11",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day11.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day11.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -140,7 +140,7 @@
             "name": "day 12",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day12.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day12.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -152,7 +152,7 @@
             "name": "day 13",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day13.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day13.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -164,7 +164,7 @@
             "name": "day 14",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day14.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day14.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -176,7 +176,7 @@
             "name": "day 15",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day15.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day15.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -188,7 +188,7 @@
             "name": "day 16",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day16.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day16.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -200,7 +200,7 @@
             "name": "day 17",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day17.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day17.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -212,7 +212,7 @@
             "name": "day 18",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day18.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day18.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -224,7 +224,7 @@
             "name": "day 19",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day19.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day19.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -236,7 +236,7 @@
             "name": "day 20",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day20.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day20.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -248,7 +248,7 @@
             "name": "day 21",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day21.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day21.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -260,7 +260,7 @@
             "name": "day 22",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day22.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day22.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -272,7 +272,7 @@
             "name": "day 23",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day23.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day23.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -284,7 +284,7 @@
             "name": "day 24",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day24.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day24.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
@@ -296,7 +296,7 @@
             "name": "day 25",
             "type": "cppvsdbg",
             "request": "launch",
-            "program": "${workspaceFolder}/zig-cache/bin/day25.exe",
+            "program": "${workspaceFolder}/zig-out/bin/day25.exe",
             "args": [],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",

build.zig

@@ -5,12 +5,13 @@ const LibExeObjStep = std.build.LibExeObjStep;
 // set this to true to link libc
 const should_link_libc = false;
 
-const test_files = [_][]const u8 {
+const test_files = [_][]const u8{
     // list any zig files with tests here
 };
 
 fn linkObject(b: *Builder, obj: *LibExeObjStep) void {
     if (should_link_libc) obj.linkLibC();
+    _ = b;
 
     // Add linking for packages or third party libraries here
 }
@@ -26,13 +27,14 @@ pub fn build(b: *Builder) void {
     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
     const mode = b.standardReleaseOptions();
 
-    // Set up an exe for each day
+    const install_all = b.step("install_all", "Install all days");
-    comptime var day = 1;
+    const run_all = b.step("run_all", "Run all days");
-    inline while (day <= 25) : (day += 1) {
-        @setEvalBranchQuota(100000); // this comptimePrint is pretty expensive
-        const dayString = comptime std.fmt.comptimePrint("day{:0>2}", .{ day });
-        const zigFile = "src/" ++ dayString ++ ".zig";
 
+    // Set up an exe for each day
+    var day: u32 = 1;
+    while (day <= 25) : (day += 1) {
+        const dayString = b.fmt("day{:0>2}", .{day});
+        const zigFile = b.fmt("src/{s}.zig", .{dayString});
 
         const exe = b.addExecutable(dayString, zigFile);
         exe.setTarget(target);
@@ -43,8 +45,11 @@ pub fn build(b: *Builder) void {
 
         const install_cmd = b.addInstallArtifact(exe);
 
-        const install_step = b.step("install_" ++ dayString, "Install " ++ dayString ++ ".exe");
+        const step_key = b.fmt("install_{s}", .{dayString});
+        const step_desc = b.fmt("Install {s}.exe", .{dayString});
+        const install_step = b.step(step_key, step_desc);
         install_step.dependOn(&install_cmd.step);
+        install_all.dependOn(&install_cmd.step);
 
         const run_cmd = exe.run();
         run_cmd.step.dependOn(&install_cmd.step);
@@ -52,8 +57,10 @@ pub fn build(b: *Builder) void {
             run_cmd.addArgs(args);
         }
 
-        const run_step = b.step(dayString, "Run " ++ dayString);
+        const run_desc = b.fmt("Run {s}", .{dayString});
+        const run_step = b.step(dayString, run_desc);
         run_step.dependOn(&run_cmd.step);
+        run_all.dependOn(&run_cmd.step);
     }
 
     // Set up a step to run all tests

src/day01.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day01.txt");
 
 pub fn main() !void {
     

src/day02.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day02.txt");
 
 pub fn main() !void {
     

src/day03.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day03.txt");
 
 pub fn main() !void {
     

src/day04.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day04.txt");
 
 pub fn main() !void {
     

src/day05.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day05.txt");
 
 pub fn main() !void {
     

src/day06.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day06.txt");
 
 pub fn main() !void {
     

src/day07.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day07.txt");
 
 pub fn main() !void {
     

src/day08.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day08.txt");
 
 pub fn main() !void {
     

src/day09.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day09.txt");
 
 pub fn main() !void {
     

src/day10.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day10.txt");
 
 pub fn main() !void {
     

src/day11.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day11.txt");
 
 pub fn main() !void {
     

src/day12.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day12.txt");
 
 pub fn main() !void {
     

src/day13.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day13.txt");
 
 pub fn main() !void {
     

src/day14.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day14.txt");
 
 pub fn main() !void {
     

src/day15.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day15.txt");
 
 pub fn main() !void {
     

src/day16.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day16.txt");
 
 pub fn main() !void {
     

src/day17.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day17.txt");
 
 pub fn main() !void {
     

src/day18.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day18.txt");
 
 pub fn main() !void {
     

src/day19.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day19.txt");
 
 pub fn main() !void {
     

src/day20.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day20.txt");
 
 pub fn main() !void {
     

src/day21.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day21.txt");
 
 pub fn main() !void {
     

src/day22.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day22.txt");
 
 pub fn main() !void {
     

src/day23.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day23.txt");
 
 pub fn main() !void {
     

src/day24.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day24.txt");
 
 pub fn main() !void {
     

src/day25.zig

@@ -2,6 +2,15 @@ const std = @import("std");
 const Allocator = std.mem.Allocator;
 const assert = std.debug.assert;
 const print = std.debug.print;
+const ArrayList = std.ArrayList;
+const HashMap = std.AutoHashMap;
+const StringHashMap = std.StringHashMap;
+const BitSet = std.DynamicBitSet;
+
+var gpa_impl = std.heap.GeneralPurposeAllocator(.{}){};
+const gpa = &gpa_impl.allocator;
+
+const data = @embedFile("../data/day25.txt");
 
 pub fn main() !void {