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Glossary

  • Difficulty

    • This value indicates that a person with the current internal rating (unadjusted rating) would have a 50% chance of solving the problem in a contest.
    • There are problems with a test tube emoji (🧪) next to the estimated difficulty. This indicates that the difficulty was estimated using somewhat forceful methods for problems before the official rating system was introduced.
    • A problem with a Difficulty of X means "half of the people with a rating of X can solve this problem," not "everyone with a rating of X can solve this problem."

  • Streak

    • The number of consecutive days you have solved new problems that you haven't solved before.
    • Longest Streak is calculated based on JST, while Current Streak is calculated based on Local Time.
    • Solving a problem that you have solved before will not increase the Streak count.

References

The following web pages were referenced in creating this user guide.

  1. https://ntk-ta01.hatenablog.com/entry/2020/04/15/001405
  2. https://trap.jp/post/992/
  3. https://pepsin-amylase.hatenablog.com/entry/atcoder-problems-difficulty