Function aoc::y24d01::y24d01p2

pub fn y24d01p2(input: &str) -> u32

The solution for part two of the day one challenge.

TODO

Example

// probably read this from the input file...
let input = concat!(
    "1   2\n",
    "3   4\n",
    "2   2\n",
);
assert_eq!(y24d01p2(input), 4);