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Difficulty
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1808
Post Office
Very easy
1809
Aronson
Very easy
1815
Top This
Very easy
1821
Comparing Answers
Very easy
1841
DNA Robot
Very easy
1856
Championship on Fungi Sport
Very easy
1862
Five-star challenge
Easy
1886
Restoration of points quantity
Medium
1893
The Power of the Hero
Very easy
1894
Caravans
Very easy
1923
Tiny Puzzle
Very hard
1940
Ice rink
Hard
1957
Silver medal
Very easy
1959
Deletion
Easy
1968
Balls
Easy
1986
Anna and the palindrome
Medium
2003
Cellular communication
Hard
2005
Weighing 2
Very hard
2018
Minimal d-exponent
Medium
2025
Complex XOR Game
Very easy
2026
LOGO
Easy
2062
Lilavati
Hard
2069
Vasyas tickets
Hard
2072
Ancient Scroll Restoration
Medium
2075
Infinite fraction
Easy
1
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