array-range-queries

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C Program To Find Prime Numbers Between Given Range

Last Updated: 11 September 2024

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. For example, 2, 3, 5, 7, and 11 are ...read more

Total numbers with no repeated digits in a range

Last Updated: 08 May 2023

Given a range[Tex]L, R[/Tex]find total such numbers in the given range such that they have no repeated digits. For example: 12 has no repeat ...read more

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Difference Array | Range update query in O(1)

Last Updated: 29 March 2024

Consider an array A[] of integers and following two types of queries.update(l, r, x) : Adds x to all values from A[l] to A[r] (both inclusiv ...read more

Sparse Table

Last Updated: 29 March 2024

We have briefly discussed sparse table in Range Minimum Query (Square Root Decomposition and Sparse Table)Sparse table concept is used for f...read more

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Find element at given index after a number of rotations

Count Primes in Ranges

Last Updated: 13 December 2024

Given a range [L, R], we need to find the count of total numbers of prime numbers in the range [L, R] where 0 = L = R 10000. Consider that ...read more

Last Updated: 19 September 2023

Given an array of N integers, M ranges of indices as queries, and a specific index K, the task is to right rotate the array circularly betwe ...read more

Queries for counts of array values in a given range

Last Updated: 20 March 2025

Given an unsorted array of integers and a set ofmqueries, where each query consists of two integersxandy, the task is to determine the numbe ...read more

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Square Root (Sqrt) Decomposition Algorithm

Last Updated: 16 August 2023

Square Root Decomposition Technique is one of the most common query optimization techniques used by competitive programmers. This technique ...read more

Competitive Programming

Range Minimum Query (Square Root Decomposition and Sparse Table)

Last Updated: 25 August 2023

We have an array arr[0 . . . n-1]. We should be able to efficiently find the minimum value from index L (query start) to R (query end) where...read more

Competitive Programming

MO's Algorithm (Query Square Root Decomposition) | Set 1 (Introduction)

Last Updated: 27 February 2025

Let us consider the following problem to understand MO's Algorithm. We are given an array and a set of query ranges, we are required to find ...read more

Algorithms

Lazy Propagation in Segment Tree

Last Updated: 25 April 2023

Segment tree is introduced in previous post with an example of range sum problem. We have used the same "Sum of given Range" problem to expl...read more

Binary Indexed Tree or Fenwick Tree

Last Updated: 19 December 2024

Binary Indexed Trees are used for problems where we have following types of multiple operations on a fixed sized.Prefix Operation (Sum, Prod...read more

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Segment Tree | Range Minimum Query

Last Updated: 11 February 2025

We have introduced a segment tree with a simple example in the previous post. In this post, the Range Minimum Query problem is discussed as ...read more

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Segment Tree | Sum of given range

Last Updated: 09 March 2023

Let us consider the following problem to understand Segment Trees.We have an array arr[0 . . . n-1]. We should be able toFind the sum of ele...read more