Day3 part 1

2020/zig/src/day03.zig

@@ -1,6 +1,6 @@
 const std = @import("std");
 const Allocator = std.mem.Allocator;
-const List = std.ArrayList;
+const ArrayList = std.ArrayList;
 const Map = std.AutoHashMap;
 const StrMap = std.StringHashMap;
 const BitSet = std.DynamicBitSet;
@@ -9,10 +9,34 @@ const Str = []const u8;
 const util = @import("util.zig");
 const gpa = util.gpa;
 
-const data = @embedFile("../data/day03.txt");
+const data = @embedFile("input");
 
 pub fn main() !void {
 
+    // Still have no idea how to clean up the ArrayLists
+    var it = tokenize(u8, data, "\n");
+    var rows_al = ArrayList([]bool).init(gpa);
+    while (it.next()) |line| {
+        var row = ArrayList(bool).init(gpa);
+        for (line) |char| {
+            try row.append(char == '#');
+        }
+        try rows_al.append(row.toOwnedSlice());
+    }
+    var rows = rows_al.toOwnedSlice();
+
+    var x: usize = 0;
+    var y: usize = 0;
+    var count: usize = 0;
+    while (y < rows.len) {
+        var square = rows[y][x];
+        if (square) {
+            count += 1;
+        }
+        x = try std.math.mod(usize, x + 3, rows[y].len);
+        y += 1;
+    }
+    print("{}", .{count});
 }
 
 // Useful stdlib functions