Function advent_solutions::advent2017::day05::part2

pub fn part2(jumps: &Vec<isize>) -> usize

Now, the jumps are even stranger: after each jump, if the offset was three or more, instead decrease it by 1. Otherwise, increase it by 1 as before.

Using this rule with the above example, the process now takes 10 steps, and the offset values after finding the exit are left as 2 3 2 3 -1.

assert_eq!(part2(&input), 10);

How many steps does it now take to reach the exit?