Binary Indexed Tree(Fenwick Tree)で解く問題を纏めたもの。
BIT全般
https://atcoder.jp/contests/abc340/tasks/abc340_e
https://atcoder.jp/contests/abc153/tasks/abc153_f
https://atcoder.jp/contests/abc432/tasks/abc432_e
https://atcoder.jp/contests/abc157/tasks/abc157_e
https://atcoder.jp/contests/abc221/tasks/abc221_e
https://atcoder.jp/contests/abc276/tasks/abc276_f
https://atcoder.jp/contests/abc253/tasks/abc253_f
https://atcoder.jp/contests/abc368/tasks/abc368_g
https://atcoder.jp/contests/abc285/tasks/abc285_f
https://atcoder.jp/contests/jsc2021/tasks/jsc2021_f
https://atcoder.jp/contests/abc256/tasks/abc256_f
https://atcoder.jp/contests/abc186/tasks/abc186_f
https://atcoder.jp/contests/abc356/tasks/abc356_f
https://atcoder.jp/contests/abc216/tasks/abc216_g
https://atcoder.jp/contests/typical90/tasks/typical90_q
https://atcoder.jp/contests/arc075/tasks/arc075_c
https://atcoder.jp/contests/arc194/tasks/arc194_c
https://atcoder.jp/contests/arc126/tasks/arc126_e
転倒数
https://atcoder.jp/contests/abc264/tasks/abc264_d
https://atcoder.jp/contests/tessoku-book/tasks/tessoku_book_bv
https://atcoder.jp/contests/past15-open/tasks/past202306_k
https://atcoder.jp/contests/past202010-open/tasks/past202010_k
https://atcoder.jp/contests/arc031/tasks/arc031_3
https://atcoder.jp/contests/abc190/tasks/abc190_f
https://atcoder.jp/contests/abc396/tasks/abc396_f
https://atcoder.jp/contests/abc261/tasks/abc261_f
https://atcoder.jp/contests/arc194/tasks/arc194_b
https://atcoder.jp/contests/arc043/tasks/arc043_c
https://atcoder.jp/contests/abc306/tasks/abc306_f
https://atcoder.jp/contests/abc380/tasks/abc380_g
https://atcoder.jp/contests/arc120/tasks/arc120_c
https://atcoder.jp/contests/arc088/tasks/arc088_c
https://atcoder.jp/contests/tenka1-2017/tasks/tenka1_2017_e
https://atcoder.jp/contests/agc054/tasks/agc054_c
https://atcoder.jp/contests/arc181/tasks/arc181_d
https://atcoder.jp/contests/acl1/tasks/acl1_e
