AlFlen's blog

By AlFlen, 2 months ago, translation, In English

1493A - Anti-knapsack

Idea: AlFlen, 74TrAkToR

Tutorial
Solution (74TrAkToR)

1493B - Planet Lapituletti

Idea: AlFlen

Tutorial
Solution (74TrAkToR)

1493C - K-beautiful Strings

Idea: 74TrAkToR

Tutorial
Solution (74TrAkToR)

1493D - GCD of an Array

Idea: 74TrAkToR

Tutorial
Solution (74TrAkToR)

1493E - Enormous XOR

Idea: AlFlen

Tutorial
Solution (74TrAkToR)

1493F - Enchanted Matrix

Idea: 74TrAkToR

Tutorial
Solution (74TrAkToR)

Read more »

 
 
 
 
  • Vote: I like it
  • +126
  • Vote: I do not like it

By AlFlen, 2 months ago, translation, In English

The future is bulletproof
The aftermath is secondary
It's time to do it now and do it loud!

Hello, Codeforces!

74TrAkToR and I are glad to invite you to our Codeforces Round #705 (Div. 2), which will be held at Mar/06/2021 17:05 (Moscow time). Notice the unusual time of the round. The round will be rated for all the participants with rating strictly less than 2100.

We have already held a round and we have worked on errors:

  • the statements will be short and clear
  • we tried to make pretests stronger
  • the editorial will be published shortly after the round ends

We would like to thank everyone who helped us a lot with round preparation.

You will be given 6 problems. You will have 2 hours 15 minutes to solve them.

UPD: Score distribution $$$750-1250-1750-2250-2750-3250$$$.

UPD2: Editorial

UPD3: Congratulations to the winners!

Div. 2:

  1. sawa855

  2. buihoatpt2k9

  3. Totiniii

  4. rainboy

  5. scli_kws

Div. 1 + Div. 2:

  1. neal

  2. BigBag

  3. fastmath

  4. Heltion

  5. tute7627

We wish everyone good luck!

Read more »

 
 
 
 
  • Vote: I like it
  • +679
  • Vote: I do not like it

By AlFlen, history, 9 months ago, translation, In English

1393A - Rainbow Dash, Fluttershy and Chess Coloring

Idea: AlFlen

Tutorial
Solution (74TrAkToR)

1393B - Applejack and Storages

Idea: 74TrAkToR

Tutorial
Solution (74TrAkToR)

1393C - Pinkie Pie Eats Patty-cakes

Idea: 74TrAkToR и lapochka_queen

Tutorial
Solution (AlFlen)

1393D - Rarity and New Dress

Idea: 74TrAkToR

Tutorial
Solution (74TrAkToR)

1393E2 - Twilight and Ancient Scroll (harder version)

Idea: AlFlen

Tutorial
Solution (74TrAkToR)

Read more »

 
 
 
 
  • Vote: I like it
  • -80
  • Vote: I do not like it

By AlFlen, 9 months ago, translation, In English

Hello, Codeforces!

74TrAkToR and I are glad to invite you to our Codeforces Round #662 (Div. 2), which will be held at Aug/07/2020 17:35 (Moscow time). The round will be rated for all the participants with rating strictly less than 2100.

The problems were created and prepared by AlFlen and 74TrAkToR. We would also like to thank everyone who helped us a lot with round preparation.

On the round you will be asked to help main ponies from My Little Pony animated series (Fluttershy, Applejack, Twilight Sparkle, Pinkie Pie, Rarity, Rainbow Dash) and to solve 5 problems, one of which has two subtasks. You will have 2 hours to solve them.

Score distribution will be announced shortly before the round.

UPD: Score distribution: 500 — 1000 — 1500 — 1750 — (1500 + 1500)

UPD2: Editorial

We wish you good luck and high rating!

Read more »

 
 
 
 
  • Vote: I like it
  • +229
  • Vote: I do not like it