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Difficulty
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5259
Segments
Very easy
5284
And again the sum... (Easy)
Very easy
5294
Sums without a module
Very easy
5344
The MP3 Player
Very hard
5494
Quadrant Queries
Medium
5546
Explosion
Very easy
5552
Kaleidoscope
Very hard
5662
Cryptography
Very easy
5952
Segment Tree
Medium
5963
Bean Harvest
Hard
6467
Dot Product
Easy
6603
Interval Product
Medium
6638
Mysterious Inscription
Hard
7247
Queries on anti-xor
Very easy
7482
Trading
Very easy
7488
Monkey and Apple-trees
Medium
7718
Mountainous landscape
Very hard
7761
Wall
Very easy
7769
Horses
Very easy
7795
Containers and compartments
Very hard
7887
Bank
Hard
8276
Sapper
Hard
8370
Olya and the Plane
Hard
8379
Zeros and Ones
Medium
8497
Segments
Easy
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