Initial attempt at day 4 part 1

main
Adam Millerchip 4 months ago
parent 280e6fcf2b
commit 2ebd8fe609
  1. 38
      2020/zig/src/day04.zig

@ -1,18 +1,48 @@
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 StringHashMap = std.StringHashMap;
const BitSet = std.DynamicBitSet;
const Str = []const u8;
const util = @import("util.zig");
const gpa = util.gpa;
const data = @embedFile("../data/day04.txt");
const input = @embedFile("input");
pub fn main() !void {
// *still* don't know how to manage the memory here...
var passports = ArrayList([]const u8).init(gpa);
var building_passport = ArrayList(u8).init(gpa);
var prev: u8 = 'a';
// Ugh. How do we split on a known string (not single byte)?
for (input) |char| {
if (prev == '\n' and char == '\n') {
try passports.append(building_passport.toOwnedSlice());
} else {
try building_passport.append(char);
prev = char;
}
}
try passports.append(building_passport.toOwnedSlice());
const required_fields = [_][]const u8{ "byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid" };
var valid_count: usize = 0;
for (passports.items) |passport| {
var tokens = tokenize(u8, passport, ": \n");
var fields = StringHashMap(u8).init(gpa);
while (tokens.next()) |token| {
try fields.put(token, 1);
_ = tokens.next();
}
var valid = true;
for (required_fields) |required_field| {
valid = valid and fields.contains(required_field);
}
if (valid) valid_count += 1;
}
print("{}\n", .{valid_count});
}
// Useful stdlib functions

Loading…
Cancel
Save