TeaTime's blog

By TeaTime, 19 months ago, In English

A — Burenka Plays with Fractions

Authors: glebustim

Solution
Code(C++)

B — Interesting Sum

Solution
Code(C++)

C — Corners

Authors: daubi

Solution
Code(C++)

D1 — Xor-Subsequence (easy version)

Authors: kirill.kligunov

Solution
Code(C++)

D2 — Xor-Subsequence (hard version)

Authors: kirill.kligunov

Solution
Code(C++)

E — Misha and Paintings

Authors: daubi, pakhomovee

Solution
Code(C++)

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By TeaTime, 19 months ago, In English

Hello, Codeforces!

We are proud to finally invite you to participate in Codeforces Round #815 (Div. 2), which will start on Aug/18/2022 16:35 (Moscow time). You will be given 5 problems, one of which contains a subtask and 2 hours to solve them. We greatly encourage you to read all the problems.

Round is completely set by SIS (Summer Informatics School) students. During the camp our students did their best to prepare interesting and creative problems. You can check previous rounds prepared by SIS students: Codeforces Round #612, Codeforces Round #530, Codeforces Round #694.

People who participated in the creation of the round:

  • Special thanks for testing to: Dmitry Sweezy Pugachev, Alexey Mangooste Mikhnenko.

Also, we would like to thank:

  • Artyom123 for the brilliant coordination.
  • fastmath for improving one of the tasks!
  • meshanya for improving the structure of the contest!
  • MikeMirzayanov for great platforms, Codeforces and Polygon!

Scoring distribution: $$$500-1000-1250-(1500-1000)-2750$$$.

Good luck & have fun!

UPD1: Editorial

UPD2: Winners!

Div 2:

Div 1:

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