### Rudro25's blog

By Rudro25, 3 months ago,

Finally, The round is over smoothly :) We hope everyone had fun and enjoyed the contest!

A. Directional Move

Tutorial
Solution
Tester Solution

B. Make All Odd

Tutorial
Solution

C. Team

Tutorial
Solution
Tester Solution

D. XOR Game

Tutorial
Solution
Tester Solution

Tutorial
Solution
Tester Solution
Tester Solution 2

F. Offer

Tutorial
Solution
Tester Solution

-If have any more query, then please comment.

• +129

By Rudro25, 3 months ago,

Hello Codeforces!

I'm glad to welcome all of you to Noobs Round #2(Div. 4). The contest will start at wednesday, January 27, 2021 14:35 UTC. The round will not be rated for any participants since it is unofficial.

You will be given 6 problems and 2 hours to solve them. I recommend you to read all the problems :)
This problem-set were prepared for users with a rating range from 0 to 1400 but anyone is welcome to participate!!

All problems are prepared by me, with a lot of help from the testers and coordinators.

We would like to distribute our thanks equally to the following people who made this round possible.

We hope that statements are short and you will enjoy the problem set!

Good luck to everyone and Have Fun! $\;$ See you in the round! :)

UPD1: Registration available now!

UPD2: Editorial Published!

UPD3: The round is over smoothly :) I hope you've all enjoyed the round. Congratulations to the winners and to everyone for participating!

Div-4 winners:

Winners from all Participants:

And finally people who were the first to solve each problem:

A. First: Geothermal

Div-4 First : Luminal

B. First: Terabatev

Div-4 First : Terabatev

C. First: Maksim1744

Div-4 First : Luminal

D. First: Maksim1744

Div-4 First : Terabatev

E. First: Maksim1744

Div-4 First : googol_S0

F. First: i_love_cuiaoxiang

Div-4 First : HELLO_MF

• +235

By Rudro25, 7 months ago,
We are sorry for our many mistakes.

There Have many Solution and approach of any problem . We will discuss here only one approach for every problem which we found easy way .

Previousely you could only virtually , now the contest is open for practice .

A. Square Field

Tutorial
Solution in c++

Idea & Tutorial & Solution : Rudro25

B. Win Or Lose

Tutorial
Solution in c++

Idea : Rudro25 Tutorial & Solution : Muhammad_Saidul_Islam

C. Delete and insert

Tutorial
Solution in c++

Idea : Muhammad_Saidul_Islam Tutorial & Solution : Rudro25

Muhammad_Saidul_Islam's solution with less complexity :

Solution

D. Triple Fighting

Tutorial
Solution in c++

Idea & Tutorial & Solution : Rudro25

E. Absolute value and divisors

Tutorial
Solution in c++

Idea : Muhammad_Saidul_Islam Tutorial & Solution : Rudro25

Muhammad_Saidul_Islam's solution with less complexity :

solution

F. Home Work

Tutorial
Solution in c++

Idea & Tutorial & Solution : Rudro25

• +39

By Rudro25, 7 months ago,

Hello codeforces !

Muhammad_Saidul_Islam and I glad to invite you to our First round " Noobs Round #1 (div. 4) " .. The round will not be rated for any participants since it is unofficial.

You can virtually participate in the contest by clicking this link:

You can participate whenever you want, just click the link above and virtually participate. After enter in the problem-set we will give you 2.5 hours to solve the problem . After 2.5 hours you can not enter the problem-set again.

You will be given six tasks and 2.5 hours to solve them. The problems were created and prepared by Rudro25 and Muhammad_Saidul_Islam for users with a rating range from 0 to 1400 But anyone is welcome to participate in the round!

We would like to thank everyone who was involved in the round preparation:

• wan-_-s ,AST_TheCoder for testing the problems and providing useful feedback.
• MikeMirzayanov for Polygon and Codeforces platforms.
• You for participating in this round. Thanks!

Even though the contest is unrated we believe it is a really good way of practice, especially for Div 4 users. We tried our best to keep the statements short and clear and we hope you will like our problems!

Good luck and Have Fun !

• It's our First contest But we tried our best. So please consider our mistake . And if you find any unclear / wrong statement then please comment below .
• If you use any illegal way . we will remove you from standing !

N.B. Editorial will be posted September 28 by Muhammad_Saidul_Islam or Rudro25. And We will open it for practice after 27 September , requesting you to wait .