question_id's blog

By question_id, history, 9 years ago, In English

I need some problems that can be solved using prefix tree/trie in codeforces. I tried tag option to find from problemset menu but it doesn't work.

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9 years ago, # |
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1 , 2, 3

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6 years ago, # |
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455B is good problem on the trie+dp.