awoo's blog

By awoo, history, 40 hours ago, translation, In English

1511A - Review Site

Idea: BledDest

Tutorial
Solution (adedalic)

1511B - GCD Length

Idea: BledDest

Tutorial
Solution (awoo)

1511C - Yet Another Card Deck

Idea: BledDest

Tutorial
Solution (Neon)

1511D - Min Cost String

Idea: BledDest

Tutorial
Solution (Neon)

1511E - Colorings and Dominoes

Idea: BledDest

Tutorial
Solution (BledDest)

1511F - Chainword

Idea: BledDest

Tutorial
Solution (awoo)

1511G - Chips on a Board

Idea: BledDest

Tutorial
Solution (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +79
  • Vote: I do not like it

By awoo, history, 4 days ago, translation, In English

Hello Codeforces!

On Apr/12/2021 17:35 (Moscow time) Educational Codeforces Round 107 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Calling on all Codeforces,

Harbour.Space University is offering a unique opportunity to study in Barcelona for those who are interested in joining our young and dynamic competitive programming team. We accept medalists and top performers of IOI, IMO, ICPC, and participants with Codeforces rank above 2000.

Codeforces and Harbour.Space

Harbour.Space has a single, key requirement: be passionate and motivated to learn and/or work in the field of competitive programming in the long term. Even if you have already exhausted all your ICPC attempts, you are still welcome.

Join us to help build a comprehensive system of preparation for IOI and ICPC for the next generations! We believe that if you have the talent and determination to succeed, you can. We want to help you make it happen.

In addition to courses taught by some of the world's foremost experts in their fields, Harbour.Space offers these benefits upon acceptance for this scholarship:

  • A full tuition fee waiver (Bachelor and Master degrees)
  • Student visa
  • Private health insurance
  • Monthly living allowance*

Codeforces and Harbour.Space

In return, we demand dedication to learning and improving yourselves:

Study three hours per day
Train continuously for ICPC, if you are still eligible for participation
Intern four hours per day

Ready to formally submit your application? Please register on our website, attach your latest CV, and pay a non-refundable €125 application fee. The fee guarantees we can process every single application in a fair and timely manner, and maintain the highest possible standards of assessment.

Register→

Our admission process is a holistic review of each candidate's abilities, achievements, and potential to create something exceptional.

You may choose to study in the following areas of specialization:

  1. Computer Science
  2. Data Science
  3. Cyber Security
  4. Front-End Development

Codeforces and Harbour.Space

All our degrees are taught in English. If you want to learn more about our programs please visit our website or contact our admissions office.

*The exact living allowance level throughout the entire duration of studies depends on the performance during the interview and on the overall performance. As a guidance, it is in the range of 500-1500 EUR.

Harbour.Space University Team

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 risujiroh 7 233
2 Maksim1744 7 243
3 noimi 7 253
4 fastmath 7 278
5 mango_lassi 7 288

145 successful hacks and 1221 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Maksim1744 0:01
B SSRS_ 0:03
C BrunoFMUFC 0:06
D SSRS_ 0:10
E AmShZ 0:08
F SSRS_ 0:51
G Potassium 0:45

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +208
  • Vote: I do not like it

By awoo, history, 4 weeks ago, translation, In English

1499A - Domino on Windowsill

Idea: adedalic

Tutorial
Solution (adedalic)

1499B - Binary Removals

Idea: BledDest

Tutorial
Solution (Neon)

1499C - Minimum Grid Path

Idea: adedalic

Tutorial
Solution (adedalic)

1499D - The Number of Pairs

Idea: Neon

Tutorial
Solution (Neon)

1499E - Chaotic Merge

Idea: BledDest

Tutorial
Solution 1 (awoo)
Solution 2 (awoo)

1499F - Diameter Cuts

Idea: BledDest

Tutorial
Solution (awoo)

1499G - Graph Coloring

Idea: BledDest

Tutorial
Solution (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +111
  • Vote: I do not like it

By awoo, history, 4 weeks ago, translation, In English

Hello Codeforces!

On Mar/18/2021 17:50 (Moscow time) Educational Codeforces Round 106 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Codeforces and Harbour.Space

Dear Codeforces!

We are coming with another scholarship opportunity to share with you. This time, our scholarship is targeted towards the brightest women in the community.

As you might know, March is the month where the whole world celebrates women. At Harbour.Space we want to use this opportunity to encourage more women to join the tech world and challenge the gender-bias in this field.

We believe that gender equality in the workplace starts with gender equality in the classroom. For that reason, we are offering our Women in Tech Scholarship. The scholarship consists of:

  • 50% off the yearly tuition fee: covers around €29,000 for bachelors and €11,450 for masters.
  • 32% off the application fee: €85 instead of €125

You can find more information about the scholarship here.

MORE INFO→

Harbour.Space

Make sure to apply before March 31st to benefit from the scholarship and discount.

Don’t hesitate to share this opportunity with any bright women in your personal circle as well. A simple share can help us transform someone's life.

We are always happy to see Codeforce members join the Harbour.Space family.

Keep in touch and follow us on LinkedIn for more scholarship opportunities. And follow us on Instagram to stay in touch with our student life, events, and success stories from our students.

Good luck on your round, and see you next time!

Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 dlalswp25 6 128
2 Maksim1744 6 138
2 DreamingLeaf 6 138
4 nuip 6 149
4 kotatsugame 6 149

149 successful hacks and 1485 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A pavement 0:01
B PCTprobability 0:04
C PCTprobability 0:08
D Parliament 0:09
E KaladinStormblessed 0:17
F 718_MiL 0:10
G rainboy 1:27

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +132
  • Vote: I do not like it

By awoo, history, 6 weeks ago, translation, In English

1494A - ABC String

Idea: BledDest

Tutorial
Solution (Neon)

1494B - Berland Crossword

Idea: Neon

Tutorial
Solution (awoo)

1494C - 1D Sokoban

Idea: adedalic

Tutorial
Solution (awoo)

1494D - Dogeforces

Idea: Neon

Tutorial
Solution (Neon)

1494E - A-Z Graph

Idea: adedalic

Tutorial
Solution (adedalic)

1494F - Delete The Edges

Idea: BledDest

Tutorial
Solution (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +78
  • Vote: I do not like it

By awoo, history, 6 weeks ago, translation, In English

Hello Codeforces!

On Mar/02/2021 17:45 (Moscow time) Educational Codeforces Round 105 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Codeforces and Harbour.Space

Amazing news once again, Codeforces!

We are especially glad to have a chance to share our scholarship opportunities more often!

This time we have partnered with OneRagtime again to open the door for an exciting career in technology for the most talented people in our network.

In partnership with OneRagtime, we are offering a full scholarship to study a Master’s in Computer Science at Harbour.Space while working as a Full Stack Developer at OneRagtime!

Scholarship Highlights:

Work in Europe’s most exciting tech cities

Scholarship value of up to €31,500

Competitive compensation for the internship at OneRagtime (€800 / month)

Opportunity to join OneRagtime full-time after graduation

Some of the advantages of working at OneRagtime:

  • International team
  • Fast-paced workplace
  • Be a part of the OneRagtime adventure!
  • Be fully immersed in the European tech ecosystem
  • Thrive within a Venture Capital that does things a little differently
  • Work in Europe’s most exciting tech cities

Codeforces and Harbour.Space

We have previously partnered with other companies like OneRagtime, Hansgrohe, Coherra, and Remy Robotics to empower young talents around the world and help them boost their tech career. We’ve already filled a few of the positions with OneRagtime including:

  • Full Stack Developer at OneRagtime awarded to Alejandro Martinez from Mexico
  • UI/UX designer at OneRagtime awarded to Davit Petriashvili from Georgia

We are always happy to see Codeforces members join the Harbour.Space family. Apply now to get a chance to learn from the best in the field and kickstart your career!

Keep in touch and follow us on LinkedIn for more scholarship opportunities. And follow us on Instagram to evidence student life, events, and success stories from our apprenticeship program students.

Good luck on your round, and see you next time!

Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 antontrygubO_o 6 251
1 Pyqe 6 251
3 kefaa2 6 260
4 tute7627 6 272
5 Um_nik 6 288

Congratulations to the best hackers:

Rank Competitor Hack Count
1 noimi 11
2 neal 7
3 Origenes 6
4 Kregor 5:-2
5 chilliagon 5:-4
94 successful hacks and 293 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A noimi 0:01
B noimi 0:04
C wygzgyw 0:15
D conan1412yang99 0:16
E thenymphsofdelphi 0:15
F rainboy 0:35

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +119
  • Vote: I do not like it

By awoo, history, 2 months ago, translation, In English

1487A - Arena

Idea: BledDest

Tutorial
Solution (Neon)

1487B - Cat Cycle

Idea: adedalic

Tutorial
Solution (adedalic)

1487C - Minimum Ties

Idea: BledDest

Tutorial
Solution (BledDest)

1487D - Pythagorean Triples

Idea: Neon

Tutorial
Solution (Neon)

1487E - Cheap Dinner

Idea: BledDest

Tutorial
Solution (BledDest)

1487F - Ones

Idea: Neon

Tutorial
Solution (Neon)

1487G - String Counting

Idea: BledDest

Tutorial
Solution (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +83
  • Vote: I do not like it

By awoo, history, 2 months ago, translation, In English

Hello Codeforces!

On Feb/15/2021 17:35 (Moscow time) Educational Codeforces Round 104 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Codeforces and Harbour.Space

Amazing news, Codeforces!

As we promised last time, we are coming back with a new scholarship opportunity!

We have partnered with Coherra to open the door for an exciting career in technology for the most talented people in our network.

In partnership with Coherra, we are offering a full scholarship to study a Master’s in Front End Development at Harbour.Space while working as a Front End Developer at Coherra!

Scholarship Highlights:

Work in Europe’s most exciting tech cities

Scholarship value of up to €22,900 to study at Harbour.Space University

Competitive compensation for the internship at Coherra

Opportunity to join Coherra full-time after graduation

We have previously partnered with other companies like OneRagtime, Hansgrohe, and Remy Robotics to empower young talents around the world and help them boost their tech career. We’ve already filled a few of the positions with our partners including:

  • Full Stack Developer at OneRagtime awarded to Alejandro Martinez from Mexico
  • Innovation Designer at Hansgrohe awarded to Giorgi Zhuzhiashvili from Georgia

We are always happy to see Codeforces members join the Harbour.Space family. Apply now to get a chance to learn from the best in the field and kickstart your career!

Keep in touch and follow us on LinkedIn for more scholarship opportunities. And follow us on Instagram to evidence student life, events, and success stories from our apprenticeship programme students.

Good luck on your round, and see you next time!

Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 Muffinhead 7 211
2 noimi 7 271
3 LayCurse 7 279
4 satashun 7 333
5 nhho 7 366

90 successful hacks and 1286 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A h__h 0:01
B noimi 0:04
C MurasakiShion 0:07
D peti1234 0:06
E Bhaiya_ko_nahi_batana 0:12
F uwi 0:51
G renascencepjw0510 0:27

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +158
  • Vote: I do not like it

By awoo, history, 2 months ago, translation, In English

1476A - K-divisible Sum

Idea: vovuh

Tutorial
Solution (adedalic)

1476B - Inflation

Idea: adedalic

Tutorial
Solution (adedalic)

1476C - Longest Simple Cycle

Idea: adedalic

Tutorial
Solution (adedalic)

1476D - Journey

Idea: BledDest

Tutorial
Solution 1 (BledDest)
Solution 2 (BledDest)

1476E - Pattern Matching

Idea: BledDest

Tutorial
Solution 1 (awoo)
Solution 2 (awoo)

1476F - Lanterns

Idea: BledDest

Tutorial
Solution (BledDest)

1476G - Minimum Difference

Idea: Neon

Tutorial
Solution (Neon)

Read more »

 
 
 
 
  • Vote: I like it
  • +143
  • Vote: I do not like it

By awoo, history, 3 months ago, translation, In English

Hello Codeforces!

On Jan/29/2021 17:35 (Moscow time) Educational Codeforces Round 103 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 LiM_Hfsy_tie_tie 6 176
2 SSRS_ 6 184
3 maojiayi 6 251
4 hank55663 6 255
5 Strigon-12 6 276

Congratulations to the best hackers:

Rank Competitor Hack Count
1 stdmultiset 133:-79
2 Tsovak 98:-10
3 dapingguo8 68:-6
4 MohamedAboOkail 65:-3
5 peti1234 60:-1
3590 successful hacks and 2569 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Warawreh 0:01
B MysteryGuy2 0:04
C WZYYN 0:10
D peti1234 0:09
E CoderAnshu 0:06
F - -
G iaNTU 0:57

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +376
  • Vote: I do not like it

By awoo, history, 3 months ago, translation, In English

1473A - Replacing Elements

Idea: BledDest, adedalic

Tutorial
Solution (Neon)

1473B - String LCM

Idea: BledDest

Tutorial
Solution (Neon)

1473C - No More Inversions

Idea: adedalic

Tutorial
Solution (adedalic)

1473D - Program

Idea: BledDest

Tutorial
Solution (awoo)

1473E - Minimum Path

Idea: Neon

Tutorial
Solution (Neon)

1473F - Strange Set

Idea: BledDest

Tutorial
Solution (BledDest)

1473G - Tiles

Idea: Neon, adedalic

Tutorial
Solution (Neon)

Read more »

 
 
 
 
  • Vote: I like it
  • +133
  • Vote: I do not like it

By awoo, history, 3 months ago, translation, In English

Hello Codeforces!

On Jan/14/2021 17:35 (Moscow time) Educational Codeforces Round 102 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Hey Codeforces and Happy New Year!

To kick off 2021, we want to introduce you to new opportunities!

Undoubtedly, Harbour.Space is always happy to see Codeforces participants among our students! Young talents who are eager to learn, challenge themselves, seek continuous development are our top priority.

That’s why we want to announce our amazing apprenticeship program.

Our mission is to spark positive impact cycles between promising young talent, the tech industry, and innovative educators. We continuously work on finding the perfect match between talent and companies.

Check out a success story from one of our first apprenticeship program students.

David is a UX/UI specialist from Georgia who received a full scholarship from venture capital fund, OneRagtime.

But there are plenty more apprenticeship opportunities coming in the fields of technology, entrepreneurship, and design. Interested? Keep in touch and follow us on LinkedIn for more fantastic opportunities.

Good luck on your round, and see you next time!

Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 jiangly 7 201
2 hank55663 7 210
3 BigBag 7 282
4 Lawali 7 283
5 FluffyT 7 306

Congratulations to the best hackers:

Rank Competitor Hack Count
1 ariloc 35:-1
2 smax 34:-9
3 mrkarlo 27:-5
4 VTifand 19
5 BlueGagosipda 21:-22
242 successful hacks and 872 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Geothermal 0:01
B Geothermal 0:02
C SSRS_ 0:09
D Alfalfa_w 0:09
E _FlyingColor_ 0:16
F Apsara 0:40
G tfg 0:48

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +292
  • Vote: I do not like it

By awoo, history, 4 months ago, translation, In English

1469A - Regular Bracket Sequence

Idea: BledDest

Tutorial
Solution 1 (BledDest)
Solution 2 (BledDest)

1469B - Red and Blue

Idea: BledDest and adedalic

Tutorial
Solution 1 (Ne0n25)
Solution 2 (pikmike)

1469C - Building a Fence

Idea: adedalic

Tutorial
Solution (adedalic)

1469D - Ceil Divisions

Idea: adedalic

Tutorial
Solution (adedalic)

1469E - A Bit Similar

Idea: BledDest

Tutorial
Solution (BledDest)

1469F - Power Sockets

Idea: adedalic

Tutorial
Solution (pikmike)

Read more »

 
 
 
 
  • Vote: I like it
  • +121
  • Vote: I do not like it

By awoo, history, 4 months ago, translation, In English

Hello Codeforces!

On Dec/28/2020 17:35 (Moscow time) Educational Codeforces Round 101 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 jiangly 6 121
2 Geothermal 6 138
3 neal 6 138
4 kotatsugame 6 165
5 tute7627 6 177

Congratulations to the best hackers:

Rank Competitor Hack Count
1 dorijanlendvaj 72:-13
2 star_xingchen_c 56:-1
3 ubc_123 26:-5
4 yash_daga 21
5 lsantire 20:-2
321 successful hacks and 593 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A WuBullMe 0:01
B Geothermal 0:02
C I_love_Tanya_Romanova 0:08
D abc864197532 0:12
E Kerim.K 0:18
F jiangly 0:42

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +365
  • Vote: I do not like it

By awoo, history, 4 months ago, translation, In English

1463A - Dungeon

Idea: adedalic

Tutorial
Solution (Ne0n25)

1463B - Find The Array

Idea: BledDest

Tutorial
Solution (Ne0n25)

1463C - Busy Robot

Idea: KAN

Tutorial
Solution (pikmike)

1463D - Pairs

Idea: adedalic

Tutorial
Solution 1 (adedalic)
Solution 2 (adedalic)

1463E - Plan of Lectures

Idea: BledDest

Tutorial
Solution (pikmike)

1463F - Max Correct Set

Idea: Neon

Tutorial
Solution (Ne0n25)

Read more »

 
 
 
 
  • Vote: I like it
  • +90
  • Vote: I do not like it

By awoo, history, 4 months ago, translation, In English

Hello Codeforces!

On Dec/17/2020 17:35 (Moscow time) Educational Codeforces Round 100 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Also thanks to Nikolay KAN Kalinin for one of the problems' ideas.

Good luck to all the participants!

Our friends at Harbour.Space also have a message for you:

Codeforces and Harbour.Space

Hey Codeforces!

It’s almost the Holiday season, and this year, we have an extra reason to celebrate — this December marks Harbour.Space’s 5-year anniversary!

Looking back, we’re especially thankful for the wonderful partnerships that have made our university what it is today.

Codeforces has been one of our key partners since the beginning, and we would like to thank the community for growing with us for the past 5 years.

You guys are rock stars, and we’re excited to see where the future takes us both.

Best,
Harbour.Space University

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 heno239 6 174
2 Geothermal 6 178
3 stevenkplus 6 238
4 hank55663 5 87
5 neal 5 121

Congratulations to the best hackers:

Rank Competitor Hack Count
1 3.141592653 49:-3
2 sheaf 48:-17
3 adnan_toky 32:-2
4 _Backl1ght 30:-2
5 star_xingchen_c 27:-1
1083 successful hacks and 1034 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A I_love_Anya_Prokopyeva 0:01
B MikMirzoyanov 0:03
C Geothermal 0:11
D peti1234 0:06
E CoderAnshu 0:23
F heno239 1:13

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +422
  • Vote: I do not like it

By awoo, history, 4 months ago, translation, In English

1455A - Strange Functions

Idea: BledDest

Tutorial
Solution (Ne0n25)

1455B - Jumps

Idea: adedalic

Tutorial
Solution (adedalic)

1455C - Ping-pong

Idea: Neon

Tutorial
Solution (Ne0n25)

1455D - Sequence and Swaps

Idea: BledDest

Tutorial
Solution 1 (BledDest)
Solution 2 (adedalic)

1455E - Four Points

Idea: adedalic

Tutorial
Solution 1 (adedalic)
Solution 2 (adedalic)

1455F - String and Operations

Idea: Neon

Tutorial
Solution (Ne0n25)

1455G - Forbidden Value

Idea: MrPaul_TUser и BledDest

Tutorial
Solution (pikmike)

Read more »

 
 
 
 
  • Vote: I like it
  • +66
  • Vote: I do not like it

By awoo, history, 5 months ago, translation, In English

Hello Codeforces!

On Nov/30/2020 17:35 (Moscow time) Educational Codeforces Round 99 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 neal 7 223
2 jiangly 7 224
3 tute7627 6 190
4 nocriz 6 195
5 noimi 6 213

Congratulations to the best hackers:

Rank Competitor Hack Count
1 MarcosK 41:-6
2 dapingguo8 34:-2
3 jerdno 12:-4
4 ARTpositive 10:-1
5 halyavin 9:-1
357 successful hacks and 769 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A edickLPM 0:00
B SSRS_ 0:03
C corol 0:03
D pajenegod 0:08
E neal 0:29
F jiangly 0:55
G jiangly 1:17

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +146
  • Vote: I do not like it

By awoo, history, 5 months ago, translation, In English

1452A - Robot Program

Idea: BledDest

Tutorial
Solution (BledDest)

1452B - Toy Blocks

Idea: adedalic

Tutorial
Solution (adedalic)

1452C - Two Brackets

Idea: BledDest

Tutorial
Solution (pikmike)

1452D - Radio Towers

Idea: BledDest

Tutorial
Solution (BledDest)

1452E - Two Editorials

Idea: BledDest

Tutorial
Solution (pikmike)

1452F - Divide Powers

Idea: adedalic

Tutorial
Solution (adedalic)

1452G - Game On Tree

Idea: adedalic

Tutorial
Solution 1 (pikmike)
Solution 2 (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +98
  • Vote: I do not like it

By awoo, history, 5 months ago, translation, In English

Hello Codeforces!

On Nov/19/2020 17:35 (Moscow time) Educational Codeforces Round 98 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 dlalswp25 6 205
2 Ormlis 6 207
3 Tlatoani 6 214
4 yokozuna57 6 232
5 peti1234 6 235

Congratulations to the best hackers:

Rank Competitor Hack Count
1 racsosabe 80:-17
2 Elo 33:-4
3 peti1234 24
4 STUPID_JUSTIN 26:-7
5 xiaofan7 25:-10
605 successful hacks and 888 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Geothermal 0:01
B SSRS_ 0:04
C Valera_Grinenko 0:02
D SSRS_ 0:10
E Akulyat 0:38
F Suiseiseki 0:58
G rainboy 0:42

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +272
  • Vote: I do not like it

By awoo, history, 6 months ago, translation, In English

1437A - Marketing Scheme

Idea: adedalic

Tutorial
Solution (adedalic)

1437B - Reverse Binary Strings

Idea: adedalic

Tutorial
Solution (adedalic)

1437C - Chef Monocarp

Idea: BledDest

Tutorial
Solution 1 (pikmike)
Solution 2 (pikmike)

1437D - Minimal Height Tree

Idea: adedalic

Tutorial
Solution (adedalic)

1437E - Make It Increasing

Idea: Neon

Tutorial
Solution (Ne0n25)

1437F - Emotional Fishermen

Idea: BledDest

Tutorial
Solution (BledDest)

1437G - Death DBMS

Idea: BledDest

Tutorial
Solution 1 (pikmike)
Solution 2 (pikmike)

Read more »

 
 
 
 
  • Vote: I like it
  • +88
  • Vote: I do not like it

By awoo, 6 months ago, translation, In English

Hello Codeforces!

On Oct/27/2020 17:35 (Moscow time) Educational Codeforces Round 97 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 Um_nik 7 149
2 jiangly 7 193
3 hank55663 7 214
4 neal 7 231
5 uwi 7 250

205 successful hacks and 712 unsuccessful hacks were made in total!

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

Problem Competitor Penalty
A Drew_is_me 0:01
B Drew_is_me 0:03
C IgorI 0:03
D xb0nS 0:09
E phathnv202 0:17
F SunshinePie 0:28
G tfg 0:13

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • +356
  • Vote: I do not like it

By awoo, history, 7 months ago, translation, In English

1418A - Buying Torches

Idea: vovuh

Tutorial
Solution (vovuh)

1418B - Negative Prefixes

Idea: BledDest

Tutorial
Solution (Ne0n25)

1418C - Mortal Kombat Tower

Idea: vovuh

Tutorial
Solution (vovuh)

1418D - Trash Problem

Idea: vovuh

Tutorial
Solution (vovuh)

1418E - Expected Damage

Idea: Roms

Tutorial
Solution (Roms)

1418F - Equal Product

Idea: adedalic

Tutorial
Solution (adedalic)

1418G - Three Occurrences

Idea: BledDest and Roms

Tutorial
Solution 1 (pikmike)
Solution 2 (pikmike)

Read more »

 
 
 
 
  • Vote: I like it
  • +165
  • Vote: I do not like it

By awoo, history, 7 months ago, translation, In English

Hello Codeforces!

On Sep/14/2020 17:35 (Moscow time) Educational Codeforces Round 95 (Rated for Div. 2) will start.

Series of Educational Rounds continue being held as Harbour.Space University initiative! You can read the details about the cooperation between Harbour.Space University and Codeforces in the blog post.

This round will be rated for the participants with rating lower than 2100. It will be held on extended ICPC rules. The penalty for each incorrect submission until the submission with a full solution is 10 minutes. After the end of the contest you will have 12 hours to hack any solution you want. You will have access to copy any solution and test it locally.

You will be given 6 or 7 problems and 2 hours to solve them.

The problems were invented and prepared by Roman Roms Glazov, Adilbek adedalic Dalabaev, Vladimir vovuh Petrov, Ivan BledDest Androsov, Maksim Neon Mescheryakov and me. Also huge thanks to Mike MikeMirzayanov Mirzayanov for great systems Polygon and Codeforces.

Good luck to all the participants!

Congratulations to the winners:

Rank Competitor Problems Solved Penalty
1 dzh_loves_mjy 7 204
2 neal 7 231
3 WZYYN 7 250
4 noimi 7 357
5 Um_nik 7 384

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

Problem Competitor Penalty
A Kirill22 0:01
B dzh_loves_mjy 0:04
C SSerxhs 0:05
D gleb.astashkin 0:17
E Pigbrain 0:19
F WZYYN 0:54
G OnlyG 0:16

UPD: Due to the issues with problems A and B the round is unrated.

UPD: Editorial is out

Read more »

 
 
 
 
  • Vote: I like it
  • -544
  • Vote: I do not like it

By awoo, history, 8 months ago, translation, In English

1400A - String Similarity

Idea: BledDest

Tutorial
Solution (adedalic)

1400B - RPG Protagonist

Idea: adedalic

Tutorial
Solution (adedalic)

1400C - Binary String Reconstruction

Idea: Roms

Tutorial
Solution (Roms)

1400D - Zigzags

Idea: adedalic

Tutorial
Solution (adedalic)

1400E - Clear the Multiset

Idea: Roms

Tutorial
Solution (Roms)

1400F - x-prime Substrings

Idea: BledDest and Roms

Tutorial
Solution (pikmike)

1400G - Mercenaries

Idea: BledDest and Roms

Tutorial
Solution (BledDest)

Read more »

 
 
 
 
  • Vote: I like it
  • +204
  • Vote: I do not like it