Finds the UTC hour that minimizes the worst-case non-waking hours for anyone in the group, with ties broken to the earliest hour.
Waking hours (UTC, 0–23, comma-separated)
Enter waking hours above
Per-hour worst disadvantage
OptimalWorstOther
Disadvantage for a person at a given UTC hour = total non-waking hours (24 − waking count) if they're asleep at that hour, otherwise 0. The algorithm picks the UTC hour with the smallest maximum disadvantage across all people.