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Ruby II
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flappybirdRuby II
flappybird9
Ruby II 29428 until Ruby I
1,186 Solved490 Contributions33 Reverse rivals
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Date Added# Unlocked UsersTier
  • Skilled Problem-solver
    Solve 200 problems
    31K
  • Apprentice Problem-solver
    Apprentice Problem-solver
    Solve 100 problems
    65K
  • Newbie Problem-solver
    Newbie Problem-solver
    Solve 10 problems
    149K
  • Spent 2022 with BOJ
    Spent 2022 with BOJ
    Solved 1 or more problems in Good Bye, BOJ 2022!
    606
  • IamCoder 2022 Year-end Contest
    IamCoder 2022 Year-end Contest
    Participated in IamCoder 2022 Year-end Contest, or in its open contest
    269
  • 2022 1st Calculus, Probability, and Statistics Cup
    2022 1st Calculus, Probability, and Statistics Cup
    Solved 1 or more problems in the 2022 1st Calculus, Probability, and Statistics Cup
    359
  • Warmth in the Snow (2022)
    Warmth in the Snow (2022)
    Solved 1 or more problems in the Invitation of the Winter Forest
    462
  • The 1st Chocolate Cup (2022)
    The 1st Chocolate Cup (2022)
    Solved 1 or more problems in the 1st Chocolate Cup
    191
  • Summer Postcard Decoration: Top 1,000 (2022)
    Summer Postcard Decoration: Top 1,000 (2022)
    Achieved a rank of top 1,000 in the Summer Postcard Decoration event, 2022
    884
  • Semi-Game Cup 3 (2022)
    Semi-Game Cup 3 (2022)
    Solved 1 or more problems in Semi-Game Cup 3
    170
  • UCPC 2022
    UCPC 2022
    Participated in UCPC 2022, or its open contest
    991
  • Chicken Dance (2022)
    Chicken Dance (2022)
    Solved 1 or more problems in the 1st Gomgom Cup · © Hana Kim
    586
  • ★★Seventeen Stars★★ (2022)
    ★★Seventeen Stars★★ (2022)
    Achieved 17-star enchant at the 2022 April Fool's Day Hanbyeol Force Event
    2.1K
  • Hello, world! (2022)
    Hello, world! (2022)
    Solved uncountable problem in the Real Final Ghudegy Cup 2 2
    747
  • Binary Game 2 (2022)
    Binary Game 2 (2022)
    Solved uncountable problem in the Real Final Ghudegy Cup 2 2
    747
  • The 1st Blob Cup (2022)
    The 1st Blob Cup (2022)
    Solved 1 or more problems in the 1st Blob Cup
    317
  • IamCoder 2021 Year-end Contest
    IamCoder 2021 Year-end Contest
    Participated in IamCoder 2021 Year-end Contest, or solved 1 or more problems in its open contest
    170
  • Spent 2021 with BOJ
    Spent 2021 with BOJ
    Solved 1 or more problems in Good Bye, BOJ 2021!
    644
  • 12345