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Problems

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Difficulty
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2045
Four segments
Hard
2046
y =| cos(2x)|
Medium
2047
Almost Union-Find
Medium
2048
Broken Keyboard (a.k.a. Beiju Text)
Very easy
2049
Cake Cutting
Very hard
2050
Dynamic Inversion
Very easy
2051
Easy Problem from Rujia Liu?
2052
Fast Matrix Operations
Very easy
2053
Girls' Celebration
2054
Happy Painting!
2055
I Can Guess the Data Structure!
Very easy
2056
Jewel Magic
Very easy
2057
K Smallest Sums
Very easy
2058
Rujia Liu loves Wario Land!
2059
Lake with lilies
2060
Tale about an apple
Very easy
2061
Young Programmers
Easy
2062
Lilavati
Hard
2063
Vasya's arithmetic
Easy
2064
Vasya's Arithmetic 2
Easy
2065
Vasya and prime numbers
Easy
2066
Vasya's triangles
Very easy
2067
Gemini
Very easy
2068
Smart dog
Easy
2069
Vasyas tickets
Hard
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