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Hack!
Time Limit: 10 s
Memory Limit: 256 MB
# 7568. Keychain
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Custom Test
The problem was used in the following contest:
The 2nd Universal Cup. Stage 4: Taipei
Petrozavodsk Summer 2023. Day 6. olmrgcsi And His Friends' Contest
The 2nd Universal Cup. Stage Ω: Atlantis (
Prime
Contest)
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