On the 8th and on the 9th of December there will be local two-stage school competition in Saratov. We decided that it will be interesting to allow everybody to solve problems from it. So I am glad to announce that this weekend there will be two Div2 rounds.
The first round — Codeforces Round #154 (Div. 2) — will start at 14:00 MSK on the 8th of December.
The second round — Codeforces Round #155 (Div. 2) — will start at 14:00 MSK on the 9th of December.
Rounds will be held under usual CF rules, with one condition:
Problems will require file I/O: you have to read data from input.txt and write data to output.txt.
Score distribution will be announced just before the beginning of each round.
Participants from Div1 can take part in rounds out of competition.
UPD Here are links to solutions with file I/O in some languages:
- C++: 2366378
- Pascal: 2454867
- Java: 2366738
- Python: 2387503
- D: 2436251
- Scala: 2385341
- Haskell: 2378010
- C: 2519130
- Ruby: 2375494
- PHP: 2381582
- C# 2716641
UPD2 Score distribution in round 155 will be standard: 500-1000-1500-2000-2500.
UPD3 Tutorial is available for round 154.
UPD4 Unfortunately, in the first half of the contest, it was found that the task C checker does not check the lexicographically minimality of the answer. We offer our apologies for this error. So we adjusted checker. We conducted an investigation and found that the change has affected 53 members from the second division. We believe that a completely fair to make this competition for such participants unrated. This inaccuracy had absolutely no effect to all other.
UPD5 Tutorial is available for round 155.