Codeforces Round 691 Problems C and D Solution Explanation in English

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=JytK2v23JCM

Link to my discord server: / discord • Join for all kinds of stuff! • Time Stamps: • 00:00 - Introduction • 00:46 - C. Row GCD • 07:30 - D. Glass Half Spilled • (there's a blooper in the video btw, I've cropped it in the editor but it'll be removed only when the processing is complete)

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