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pub fn decimal_to_base_k(
k: i64,
mut n: i64,
) -> Vec<i64> {
assert!(k.abs() >= 2);
let mut nums = vec![];
loop {
nums.push(n.rem_euclid(k));
n = n.div_euclid(k);
if n == 0 {
return nums;
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test() {
let cases = vec![
((2, 6), vec![0, 1, 1]),
((2, 10), vec![0, 1, 0, 1]),
((-2, 10), vec![0, 1, 1, 1, 1]),
];
for ((k, n), ans) in cases {
assert_eq!(decimal_to_base_k(k, n), ans);
}
}
}