### zltzlt's blog

By zltzlt, history, 3 months ago,

Hello, Codeforces!

We are glad to invite you to participate in Codeforces Round 949 (Div. 2), which will start on May/31/2024 13:05 (Moscow time). Note the unusual start time of the round. You will be given 6 problems and 2 hours to solve them.

This round will be rated for participants whose rating is below 2100. Participants with higher rating can participate unofficially.

The problems were authored and prepared by sinsop90, yinhee and me.

I would like to thank:

Scoring distribution: $500 - 1000 - 1500 - 2000 - 2500 - 3500$.

Good luck & Have fun!

UPD: Congratulations to the winners!

Div 2:

Div. 1 + Div. 2:

Editorial and also Simplified Chinese Editorial are out.

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By zltzlt, history, 3 months ago,

Thank you for participating! Sorry for being much harder than usual Div. 2 :( But we still hope you find some of our problems interesting.

Rating predictions (Inspired by sum's editorial)

1981A - Turtle and Piggy Are Playing a Game

Idea: zltzlt

Hint 1
Hint 2
Solution
Code

1981B - Turtle and an Infinite Sequence

Idea: zltzlt

Hint 1
Hint 2
Solution 1
Solution 2
Code for Solution 1
Code for Solution 2

1981C - Turtle and an Incomplete Sequence

Idea: zltzlt

Hint 1
Hint 2
Solution
Code

1981D - Turtle and Multiplication

Idea: sinsop90

Hint 1
Hint 2
Solution
Code

1981E - Turtle and Intersected Segments

Idea: zltzlt
Developed by 244mhq.

Hint 1
Hint 2
Solution
Code

1981F - Turtle and Paths on a Tree

Idea: yinhee
Developed by 244mhq and zltzlt.
Thanks AFewSuns and crazy_sea for discovering Solution 2, which runs faster than Solution 1!

Hint 1
Hint 2
Solution 1
Solution 2
Code for Solution 1
Code for Solution 2
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