LeetCode 789. Escape The Ghosts - Weekly Contest 73

https://leetcode.com/contest/weekly-contest-73/problems/escape-the-ghosts/


Come to think of it, I realize no matter which location they are locating, the distance to the target is what really matters.

So naturally we come up with a helper function to getDistance,

then, naturally we will compare the distances and see if any ghosts are dangerously close.

That's it.