Hello Codeforces!
On April 28, 18:05 MSK will be held Educational Codeforces Round 20.
Series of Educational Rounds continue being held as Harbour.Space university initiative! You can read the details about the cooperation between Harbour.Space and Codeforces in the blog post.
Here is the special message from Harbour.Space University for girls from India:
Harbour.Space University offers a unique opportunity to win a FULL SCHOLARSHIP for #womenintechIndia and join our amazing Data Science, Computer Science or Cyber Security Master's Programme in Barcelona, Spain!
Follow this link to complete the application form.
The round will be unrated for all users and it will be held with extented ACM ICPC rules. After that you will have one day to hack any solution you want. You will have access to copy any solution and test it locally.
You will be given 7 problems and 2 hours 15 minutes to solve them. Though this round may come a bit harder than two previous ones, we still hope that everyone will enjoy problems.
The round was prepared by Ivan BledDest Androsov, Mikhail MikeMirzayanov Mirzayanov and me.
Good luck!
UPD: Editorial is available here
Congratulations to the winners:
| Rank | Competitor | Problems Solved | Penalty |
|---|---|---|---|
| 1 | Um_nik | 7 | 129 |
| 2 | bmerry | 7 | 160 |
| 3 | kmjp | 7 | 191 |
| 4 | KrK | 7 | 212 |
| 5 | rajat1603 | 7 | 235 |
Congratulations to the best hackers:
| Rank | Competitor | Hack Count |
|---|---|---|
| 1 | halyavin | 135:-25 |
| 2 | n.grechiha | 20 |
| 3 | oipotato | 17 |
| 4 | tqyaaaaaaaang | 16 |
| 5 | GreenGrape | 16:-3 |
324 successful hacks and 209 unsuccessful hacks were made in total!
And finally people who were the first to solve each problem:
| Problem | Competitor | Penalty |
|---|---|---|
| A | kmjp | 0:02 |
| B | RockyB | 0:02 |
| C | Lewin | 0:07 |
| D | Um_nik | 0:15 |
| E | eddy1021 | 0:20 |
| F | tanphatls987 | 0:07 |
| G | ODT | 0:33 |
