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Fenwick tree understanding
I'm having a hard time understanding the editorial: https://atcoder.jp/contests/abc221/editorial/2732
for the problem: https://atcoder.jp/contests/abc221/tasks/abc221_e
I want to know how fen-wick tree is actually working in this problem. I'm actually very new to CP and have no peers to seek help. So, I directly ask my problem through the blogs. please help me if you have an explanation to get me through it. Thanking you.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
|
Diksha_goyal | 2021-10-06 17:08:27 | 178 | ||
| en1 |
|
Diksha_goyal | 2021-10-06 16:31:22 | 463 | Initial revision (published) |
