BIT (Binary Indexed tree)
Difference between en1 and en2, changed 52 character(s)
I heard this [problem:965D]](https://codeforces.net/problemset/problem/965/D) can solve with BIT .↵
can anyone explain me this solution . ↵
i don't understand two_pointers solution of this problem well help me for that too .

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  Rev. Lang. By When Δ Comment
en2 English Nimazare 2019-03-21 00:40:54 52
en1 English Nimazare 2019-03-21 00:39:56 193 Initial revision (published)