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extern crate advent_of_code_2017;
use advent_of_code_2017::*;
fn main() {
let args = AdventArgs::init();
let directions: Vec<&str> = args.input[0].split(",").collect();
let mut x = 0.0;
let mut y = 0.0;
let mut max_away = 0.0;
for dir in directions {
y += match dir {
"ne" => 0.5,
"n" => 1.0,
"nw" => 0.5,
"se" => -0.5,
"s" => -1.0,
"sw" => -0.5,
_ => panic!("Unexpected direction {}", dir)
};
x += match dir {
"ne" => -0.5,
"n" => 0.0,
"nw" => 0.5,
"se" => -0.5,
"s" => 0.0,
"sw" => 0.5,
_ => panic!("Unexpected direction {}", dir)
};
let current_distance = tile_distance(x, y);
if current_distance > max_away {
max_away = current_distance;
}
}
if args.part == 1 {
println!("Child process is {} away", tile_distance(x, y));
} else {
println!("At most, child process was {} away", max_away);
}
}
fn tile_distance(x: f32, y: f32) -> f32 {
let tiles_x = x.abs()*2.0;
let tiles_y = if y.abs() < tiles_x {
0.0
} else {
y.abs() - tiles_x
};
tiles_x + tiles_y
}
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