pub fn insertion_sort<T: Ord>(mut a: Vec<T>) -> Vec<T> {
let n = a.len();
for i in 1..n {
for j in (0..i).rev() {
if a[j] <= a[j + 1] {
break;
}
a.swap(j, j + 1);
}
}
a
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test() {
let cases = vec![
(vec![5, 2, 4, 6, 1, 3], vec![1, 2, 3, 4, 5, 6]),
(vec![1, 2, 3], vec![1, 2, 3]),
];
for (a, ans) in cases {
assert_eq!(insertion_sort(a), ans);
}
}
}