exercism 0.1.9

My exercism
Documentation 
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pub fn square(s: u32) -> u64 {
    match s {
        1..=64 => 1 << (s - 1),
        _ => panic!("Square must be between 1 and 64")
    }
}

pub fn total() -> u64 {
    ((1_u128 << 64) - 1) as u64
}