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use rand::{Rng, SeedableRng}; use rand_chacha::ChaCha8Rng; pub fn rng() -> ChaCha8Rng { ChaCha8Rng::seed_from_u64(0xDEADBEEF) } pub fn increasing<T: From<usize> + Copy>(len: usize) -> Vec<T> { (0..len).map(Into::into).collect() }