Day 1 part 1!

main
Adam Millerchip 4 months ago
parent 46582ed853
commit 9c22642be4
  1. 1
      2020/zig/.gitignore
  2. 22
      2020/zig/src/day01.zig

@ -1,3 +1,4 @@
zig-cache/
zig-out/
data/
build_runner.zig

@ -12,7 +12,29 @@ const gpa = util.gpa;
const data = @embedFile("../data/day01.txt");
pub fn main() !void {
var it = tokenize(u8, data, "\n");
// Not sure if allocating a massive buffer and tracking the size is the right approach?
var buffer: [1000]u16 = undefined;
var i: usize = 0;
while (it.next()) |line| {
const int = try parseInt(u16, line, 10);
buffer[i] = int;
// Can we use continue expression?
i = i + 1;
}
var answer: u32 = 0;
outer: for (buffer[0..i]) |a, j| {
for (buffer[(j+1)..i]) |b| {
if (a + b == 2020) {
answer = @as(u32, a) * b;
break :outer;
}
}
}
print("{d}\n", .{answer});
}
// Useful stdlib functions

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