src/days/day04.zig

@@ -1,35 +1,14 @@
 const std = @import("std");
 
-pub const title = "Day 04: Printing Department";
+pub const title = "Day 04";
 
 pub fn run(_: std.mem.Allocator) !void {
-    const initial_input = @embedFile("./input/day04.txt");
-    //const initial_input =
-    //    \\..@@.@@@@.
-    //    \\@@@.@.@.@@
-    //    \\@@@@@.@.@@
-    //    \\@.@@@@..@.
-    //    \\@@.@@@@.@@
-    //    \\.@@@@@@@.@
-    //    \\.@.@.@.@@@
-    //    \\@.@@@.@@@@
-    //    \\.@@@@@@@@.
-    //    \\@.@.@@@.@.
-    //    ;
-
-    const input: []u8 = @constCast(initial_input);
+    const input = @embedFile("./input/day04.txt");
+    var lines = std.mem.tokenizeScalar(u8, input, '\n');
 
     var accumulator: u32 = 0;
 
-    while (true) {
-        std.debug.print("{s}\n", .{input});
-
-        var rolls_removed: u32 = 0;
-
-        var lines = std.mem.tokenizeScalar(u8, input, '\n');
-
     var previous_line: ?[]const u8 = null;
-        var line_index: usize = 0;
     while (lines.next()) |line| {
         const next_line = lines.peek();
 
@@ -57,21 +36,11 @@ pub fn run(_: std.mem.Allocator) !void {
             }
 
             if (rolls < 4) {
-                    input[(line_index * (line.len + 1)) + i] = 'x';
-                    rolls_removed += 1;
+                accumulator += 1;
             }
         }
 
         previous_line = line;
-            line_index += 1;
-        }
-
-        std.debug.print("removed {d} rolls\n", .{rolls_removed});
-        if (rolls_removed > 0) {
-            accumulator += rolls_removed;
-        } else {
-            break;
-        }
     }
 
     var buffer: [8]u8 = undefined;