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1812
Voting
1813
Queen Collisions
Very easy
1814
Mirror, Mirror on the Wall
1815
Top This
Very easy
1816
Quick Search
Very easy
1817
Image Compression
Very easy
1818
Egyptian Fractions
Very easy
1819
Lawn mower
Very easy
1820
Periodic points
Very easy
1821
Comparing Answers
Very easy
1822
Fake scoreboard
Very easy
1823
Palindromic DNA
Easy
1824
Jamping monkey
Very easy
1825
Sensor network
1826
Assembly line
Very easy
1827
Locks and keys
1828
3-sided dice
Easy
1829
Tangent to the sphere
Hard
1830
The distance between the segments
Easy
1831
Cones
Medium
1832
Sniper
Very hard
1833
Convex hull of the 3D - 1
Medium
1834
Direct
Easy
1835
The mutual arrangement of lines
Medium
1836
Convex hull of the 3D - 2
Easy
1
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