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Problems
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Problems

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Difficulty
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2001
Device Survey
Very easy
2003
Cellular communication
Hard
2007
Gift
Medium
2021
Tree
Very easy
2022
Cycles in the graph
Medium
2058
Rujia Liu loves Wario Land!
2073
Road Reform
Very easy
2078
Poet
Easy
2083
Taxi
Very easy
2084
The Great Wall
Very easy
2085
Cut
Easy
2086
Spoiled parquet
Easy
2088
Coin Collecting
Easy
2089
Corners
Very easy
2093
Data Center Cooling
Medium
2104
Game Time
Easy
2123
Hermes
Very hard
2152
The Flight Way
2183
Space Exploration
Easy
2189
Replica Placement
Very hard
2201
UFO
Medium
2202
Programming Technology
Very hard
2203
Roads
Easy
2204
Weak k-connectivity
Very easy
2209
Elevators
Easy
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