project-euler/Yet to solve/884 Removing cubes.sf

#!/usr/bin/ruby

# Removing Cubes
# https://projecteuler.net/problem=884

func a(n) {

    var count = 0

    loop {
        var v = (n - n.icbrt**3)
        ++count
        break if (v == 0)
        n = v
    }

    return count
}

say sum(1..99, {|k| a(k) })     #=> 512