How Do I Choose Which File to Submit Without Navigating File Explorer?

Revision en1, by AaronHe, 2023-01-18 01:10:45

In one of Gennady Korotkevich's videos (https://youtu.be/JU3HY5GLVnY?t=1214), I notice that when he clicks the "Choose a File" button to submit his code, the exact file he needs to submit is already selected. How does he do this?

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en1 English AaronHe 2023-01-18 01:10:45 338 Initial revision (published)