dsalgo 0.3.10

A package for Datastructures and Algorithms.
Documentation 
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use crate::modular_cumprod_usize::*;

pub fn factorial(
    m: usize,
    size: usize,
) -> Vec<usize> {
    let mut a: Vec<_> = (0..size).collect();

    a[0] = 1;

    cumprod(m, a)
}

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

    fn test() {
        let m = 1_000_000_007;

        let fact = factorial(m, 20);

        assert_eq!(
            fact,
            [
                1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800,
                39916800, 479001600, 227020758, 178290591, 674358851,
                789741546, 425606191, 660911389, 557316307,
            ]
        );
    }
}