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Difficulty
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4362
Vanya, inscribed in the polygon
Hard
4383
Football
Very hard
4384
Football 2
Medium
4385
Union of circles
Very hard
4386
Jungle Outpost
Very easy
4387
Triathlon
Very easy
4389
Intersection of nonconvex polygons
Very hard
4390
The Life of Insects
Hard
4402
Math Lessons
Medium
4405
Multi-touch gesture classification
Very hard
4410
Hitting the Targets
Very easy
4431
Combining Rectangles
Very easy
4471
Rectangles
Hard
4518
Division of Polygons
Easy
4537
Vasya and Tanks
Very easy
4551
All-Ukrainian coverage
Medium
4598
False figures
Very hard
4600
Hidden triangles
Very easy
4602
Journey
Hard
4638
Theater
Easy
4661
Gold Mines
Very easy
4662
Chords
Hard
4681
Desktop
Hard
4685
Distance
Easy
4720
New Sergey's game
Very easy
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