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PKU v. THU (Preliminary Round 2)
Time Limit: 5 s
Memory Limit: 1024 MB
# 4430. Hidden Password
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The problem was used in the following contest:
The 2021 ICPC Polish Collegiate Programming Contest (AMPPZ 2021)
XXII Open Cup named after E.V. Pankratiev, Grand Prix of Poland
Moscow International Workshops 2021. Day 1, Div.A+B Contest
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