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Hack!
Time Limit: 1 s
Memory Limit: 1024 MB
# 2556. Yet Another Interval Graph Problem
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Custom Test
The problem was used in the following contest:
Petrozavodsk Winter 2022. Day 2. KAIST Contest + KOI TST 2021
XXII Open Cup named after E.V. Pankratiev, Grand Prix of Daejeon
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