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Hack!
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PKU v. THU (Preliminary Round 2)
Time Limit: 2 s
Memory Limit: 512 MB
Communication
# 4833. Tetra-puzzle
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自定义测试
The problem was used in the following contest:
The 2nd Universal Cup. Stage 16: Run Twice
Petrozavodsk Summer 2022. Day 4. Ivan Kazmenko Contest 3
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