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Hack!
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Time Limit: 1.0 s
Memory Limit: 1024 MB
Interactive
# 9872. Key Recovery
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The problem was used in the following contest:
The 3rd Universal Cup. Stage 20: Kunming
The 2024 ICPC Asia Kunming Regional Contest
The 2025 Prime Contest (The 3rd Universal Cup Stage Ω: Atlantis)
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