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Recently added problems
20
Anton buys a piglet
19
Pasha is also against "tails"?
18
Bohdan against "tails"
17
Sleepy Sasha is Trouble at the University
16
Coordinates
15
Rook
14
Trivial? Solve It!
13
Magic Knights
12
Add and Minimize
11
Cossack Vus and Friend at CP Olympiad