I so dian↵
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Oh no my account is in danger :(↵
↵
You can practice in many ways, such as Old Education Round, Random choosing problem between 2000 and 2500, or by online resources like USACO Guide or Codeforces Edu.↵
↵
If you can read Chinese, TIOJ and TOJ may be a good option for you.↵
↵
GL for being Master!
↵
Oh no my account is in danger :(↵
↵
You can practice in many ways, such as Old Education Round, Random choosing problem between 2000 and 2500, or by online resources like USACO Guide or Codeforces Edu.↵
↵
If you can read Chinese, TIOJ and TOJ may be a good option for you.↵
↵
GL for being Master!