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Problems

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Difficulty
Sort by
1923
Tiny Puzzle
Very hard
1940
Ice rink
1957
Silver medal
Very easy
1959
Deletion
Easy
1968
Balls
Easy
1986
Anna and the palindrome
Medium
2003
Cellular communication
Hard
2005
Weighing 2
2018
Minimal d-rate
Medium
2025
Complex XOR Game
Very easy
2026
LOGO
Easy
2053
Girls' Celebration
2062
Lilavati
Hard
2069
Vasyas tickets
Hard
2072
Ancient Scroll Restoration
Medium
2075
Infinite fraction
Easy
2079
Number of inversions
Easy
2095
Horses
Very easy
2124
Artemis
Very hard
2150
Triomino
2154
Party
Easy
2158
Distance Between Letters
Very easy
2169
Permutations
2181
Wheel of Fortune
Easy
2219
Snow White and n gnomes
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