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PKU v. THU (Finals)
Time Limit: 2 s
Memory Limit: 512 MB
# 6344. The Best Problem of 2021
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Custom Test
The problem was used in the following contest:
Petrozavodsk Winter 2023. Day 6: Um_nik mod 998 244 353 Contest
The 1st Universal Cup. Stage 13: Iberia
The 2nd Universal Cup. Stage Ω: Atlantis (
Prime
Contest)
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