use math;

fn quadratic_formula(a: i32, b: i32, c: i32) -> (f64, f64)
{
    let square = b*b-4*a*c;
    let temp = (square as f64).sqrt();
    return (math::round::ceil(((-b as f64+temp)/((2*a) as f64)) +0.00001, 0), math::round::ceil(((-b as f64 -temp)/((2*a) as f64)) - 0.00001, 0));
}

fn main() {
    let mut answer = 1.0;
    // let times = [7,15,30];
    // let distances = [9,40,200];
    let times = [63,78,94,68];
    let distances = [411,1274,2047,1035];
    for index in 0..times.len() {
        let (a, b) = quadratic_formula(-1, times[index], -distances[index]);
        println!("{} {}", a, b);
        answer = answer * (b-a);
    }
    println!("{}", answer);
}