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How do we look now?
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There is already an option to share your location in Google's default texting app, but it's only for a one-time, static location. The new option updates as you move, making it much easier to connect with someone in a large crowd for a set amount of time.
First, we make a simple observation: given some number r, we can always split it into an integer part v and a fractional part x that satisfies 0 ≤ x