[2022/4/php]: Figure out why original approach to do_overlap didn't work.

[cngJo]

function do_overlap(string $a, string $b): bool {
    [$lowA, $highA] = explode("-", $a);
    [$lowB, $highB] = explode("-", $b);
    return ($highA >= $lowB) || ($lowB <= $highA);
}

My thought was, that when the higher part of A of higher than (or equal to) the lower part of B or the lower part of B is lower (or equal to) then the higher part of A, the two need to overlap.

Interestingly, it produced a valid output for another input for that puzzle :D

For my Input, tho, it detected 89 "false positives".
(The actual solution way 89 lower than what my original method found)