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Diamond IV
ProblemsUnrated
Arena
chas0612Diamond IV
chas06127
Diamond IV 237030 until Diamond III
645 Solved65 Contributions7 Reverse rivals
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Date Added# Unlocked UsersTier
  • Spend 2023 with BOJ
    Solved 1 or more problems in Hello, BOJ 2023!
    290
  • The 2nd MatKor Cup : 2023 Winter
    The 2nd MatKor Cup : 2023 Winter
    Participated in the 2nd MatKor Cup, or solved 1 or more problems in its open contest
    473
  • Spent 2022 with BOJ
    Spent 2022 with BOJ
    Solved 1 or more problems in Good Bye, BOJ 2022!
    606
  • Semi-Game Cup 3 (2022)
    Semi-Game Cup 3 (2022)
    Solved 1 or more problems in Semi-Game Cup 3
    170
    • 1