Note: The text editorials will be provided by the authors of the round. This video tutorial acts as an additional resource for those who prefer video over text, not as a substitute for the text editorial.
Thanks to Shayan
2197A — Friendly Numbers
Video
2197B — Array and Permutation
Video
2197C — Game with a Fraction
Video
2197D — Another Problem about Beautiful Pairs
Video
2197E2 — Interactive Graph(Hard Version)
Video
