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Автор codemastercpp, история, 3 года назад, По-английски

The last contest of CodeChef (this one) had 2 rerooting problems and it wasn't really solved by many people(even in Div1), so I figured it's something not many people know.

So I have made a tutorial video on the same: https://www.youtube.com/watch?v=7_huTWwl5jM&ab_channel=CMC

In it I discuss:

  • How to identify which problem requires this

  • How to go about solving it

  • How to implement without much hassle

  • Some problems that require it and their solution/hint

When I first came up with this rerooting my implementation was pretty terrible but now it's much better IMO, so I also wanted to share it.

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