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How to Use Binary Indexed Tree for Counting Reverse Pairs in an Array?

score 100 · Answer 1 · 2023-12-31T14:57:42.420000

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How to Use Binary Indexed Tree for Counting Reverse Pairs in an Array?

100 views Asked by Vishal Jangid At 31 December 2023 at 14:57

score 135 · Answer 2 · 2023-09-21T09:17:54.713000

Why we need two fenwick tree to get range sum of [l, r] given there are array of numbers and range updates and queries are performed on the array?

135 views Asked by Rupasai Rangaraju At 21 September 2023 at 09:17

score 305 · Answer 3 · 2021-04-04T01:24:01.690000

Quick Way of Finding How many Substrings has first and last character repeated inside

305 views Asked by halcyon44 At 04 April 2021 at 01:24

score 253 · Answer 4 · 2021-03-15T01:53:53.690000

Binary Indexed Tree: Why does "i + lowBit(i)" work?

253 views Asked by ihainan At 15 March 2021 at 01:53

score 345 · Answer 5 · 2020-07-15T08:53:29.930000

Fenwick tree(BIT). Find the smallest index with given cumulative frequency in O(logN)

345 views Asked by Hlib Pylypets At 15 July 2020 at 08:53

score 2716 · Answer 6 · 2020-07-14T12:44:13.667000

how to increase the size limit of a mutable list in kotlin?

2.7k views Asked by Kushagra At 14 July 2020 at 12:44

score 279 · Answer 7 · 2020-04-09T13:22:13.830000

How can we calculate weighted cumulative sum of squares with prefix range updates by one?

279 views Asked by piedpiper At 09 April 2020 at 13:22

score 9029 · Answer 8 · 2019-11-22T13:20:10.663000

What does "x += x & (-x)" mean?

9k views Asked by eleven22 At 22 November 2019 at 13:20

score 94 · Answer 9 · 2018-12-14T14:44:28.527000

C++ Counting inversions in array, Fatal Signal 11 (BIT)

94 views Asked by Nedas Bolevičius At 14 December 2018 at 14:44

score 606 · Answer 10 · 2018-08-01T18:35:47.483000

Update step in Fenwick Trees

606 views Asked by user43389 At 01 August 2018 at 18:35

score 136 · Answer 11 · 2018-03-01T15:45:10.723000

Count "minimal" values

136 views Asked by bordus At 01 March 2018 at 15:45

score 280 · Answer 12 · 2018-02-05T06:08:38.770000

Difference between Binary Search Tree and Binary Index Tree

280 views Asked by 0xAliHn At 05 February 2018 at 06:08

score 514 · Answer 13 · 2018-01-07T05:52:20.283000

Answer queries about the number of distinct numbers in a given range

514 views Asked by Diego Becquer At 07 January 2018 at 05:52

score 135 · Answer 14 · 2017-11-02T09:17:50.873000

how to get inversion count with update

135 views Asked by Brian Lee At 02 November 2017 at 09:17

score 633 · Answer 15 · 2017-07-26T17:58:34.087000

can someone provide me the algorithm of 2-d binary indexed tree?

633 views Asked by goku At 26 July 2017 at 17:58

score 299 · Answer 16 · 2017-07-10T14:21:25.080000

String query with binary indexed tree

299 views Asked by nRT At 10 July 2017 at 14:21

score 568 · Answer 17 · 2017-05-28T07:00:35.280000

Application of binary indexed tree

568 views Asked by aroma At 28 May 2017 at 07:00

score 753 · Answer 18 · 2017-03-20T20:41:47.953000

range XORed sum using BIT or Fenwick tree

753 views Asked by Roshan At 20 March 2017 at 20:41

score 471 · Answer 19 · 2017-03-09T02:54:49.090000

RMQ using two fenwick trees (binary indexed tree)

471 views Asked by shole At 09 March 2017 at 02:54

score 392 · Answer 20 · 2016-12-07T06:05:39.960000

Find number of items with weight k in a range (with updates and queries)

392 views Asked by Donald At 07 December 2016 at 06:05

TechQA.

List Question

How to Use Binary Indexed Tree for Counting Reverse Pairs in an Array?

Why we need two fenwick tree to get range sum of [l, r] given there are array of numbers and range updates and queries are performed on the array?

Quick Way of Finding How many Substrings has first and last character repeated inside

Binary Indexed Tree: Why does "i + lowBit(i)" work?

Fenwick tree(BIT). Find the smallest index with given cumulative frequency in O(logN)

how to increase the size limit of a mutable list in kotlin?

How can we calculate weighted cumulative sum of squares with prefix range updates by one?

What does "x += x & (-x)" mean?

C++ Counting inversions in array, Fatal Signal 11 (BIT)

Update step in Fenwick Trees

Count "minimal" values

Difference between Binary Search Tree and Binary Index Tree

Answer queries about the number of distinct numbers in a given range

how to get inversion count with update

can someone provide me the algorithm of 2-d binary indexed tree?

String query with binary indexed tree

Application of binary indexed tree

range XORed sum using BIT or Fenwick tree

RMQ using two fenwick trees (binary indexed tree)

Find number of items with weight k in a range (with updates and queries)

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