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Problems

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Difficulty
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1793
A head on one's shoulders
Easy
1794
By arrangement!
Easy
1795
Smooth numbers
Medium
1796
Diameter of the graph
1797
Breaking the Hash Function
Very easy
1798
Graphic file
1799
Transition Year 2. The Bridges Return
Medium
1800
Tic-tac-toe
Very easy
1801
Parenthesis
Very easy
1802
Ropes
1803
Chain Code
Medium
1804
Task
Hard
1805
Page Count
1806
Soccer
Very easy
1807
Railroad
Very easy
1808
Post Office
Very easy
1809
Aronson
Very easy
1810
Judges' Time Calculation
1811
Mad Scientist
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
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