use rand::Rng;

#[derive(Debug, Clone, Copy, PartialEq)]
enum Weather { Sunny, Rainy }

struct WeatherChain {
    /// transition[current][next] = probability
    transition: [[f64; 2]; 2],
}

impl WeatherChain {
    fn step(&self, current: Weather, rng: &mut impl Rng) -> Weather { todo!() }
    fn simulate(&self, start: Weather, steps: usize, rng: &mut impl Rng) -> Vec<Weather> { todo!() }
}

fn main() {
    todo!()
}