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Problems

Fenwick Tree
Difficulty
Sort by
2875
Changing on a Segment (High)
Very easy
2876
Change on the Segment Junior
Easy
2940
Dima and large array
Very easy
2941
Dima and array
Very easy
3061
Inner Vertices
Very easy
3395
A Safe Bet
Very easy
3842
Bitris
Very easy
4073
Its a Murder!
Very easy
4255
Sum on a segment
Very easy
4496
Adventures of Dunno and His Friends
Very easy
4952
K-inversions
Very easy
5274
Fenechka
Hard
5449
Kitten's Task
Very easy
5619
Stars
6021
Mega Inversions
Very easy
8247
Building a Fenwick Tree
Very easy
8735
Train Swapping
10540
Why Did the Cow Cross the Road III (Gold)