frequency-counting

745+ posts

Check if Binary Array can be made Palindrome by flipping two bits at a time

Last Updated: 24 July 2023

Given a binary array A[] of size N, the task is to check whether the array can be converted into a palindrome by flipping two bits in each operation.Note: The operation ca...read more

Greedy

Technical Scripter

Technical Scripter 2022

DSA

Arrays

frequency-counting

Count all pairs of rows and columns which are equal

Last Updated: 03 July 2024

Given a matrix mat[][] of size N * N (1 ? N ? 1000), the task is to find the number of pairs of rows and columns (Rowi, Colj), such that row Rowi and column Colj are equal...read more

Matrix

Technical Scripter

Technical Scripter 2022

DSA

frequency-counting

Count Substrings with at least one occurrence of first K alphabet

Last Updated: 14 September 2023

Given a string S of size N and a positive integer K. The given string only consists of the first K English lowercase alphabets. The task is to find the number of substring...read more

Strings

Hash

Technical Scripter

Technical Scripter 2022

DSA

frequency-counting

two-pointer-algorithm

Find the winner if player removes any number of 0 from one side of 1

Last Updated: 09 March 2023

Given an arr[] of binary digits. Consider two players X and Y are playing a game where in one move a player can remove any number of zeros from either the left or right of...read more

Technical Scripter 2022

DSA

frequency-counting

Find two unique Palindrome Strings using given String characters

Last Updated: 19 January 2023

You are given a string S of two distinct characters as input, the task is to find two strings using characters of the given string, such that both strings are different fr...read more

Strings

Technical Scripter

Technical Scripter 2022

DSA

palindrome

frequency-counting

Minimize Array size by replacing adjacent integers by their Modulo

Last Updated: 15 May 2024

Given an array arr[] of positive integers of size N, the task is to find the minimum possible size of the array that can be obtained by replacing any two adjacent positive...read more

Mathematical

Technical Scripter

Technical Scripter 2022

DSA

Modular Arithmetic

frequency-counting

Minimize deletion or append to make consecutive occurrence of all elements equal

Last Updated: 10 April 2023

Given an array arr[] of size N having positive elements, the task is to find the minimum number of deletion or append operations to make consecutive occurrences of all ele...read more

Sorting

Technical Scripter

Technical Scripter 2022

DSA

Arrays

frequency-counting

Count of Subsequences with distinct elements

Last Updated: 29 October 2023

Given an array arr[] (1=a[i]=1e9) containing N (1=N=1e5) elements, the task is to find the total number of subsequences such that all elements in that subsequences are dis...read more

JavaScript - Counting Frequencies of Array Elements

Last Updated: 14 November 2024

Here are the various approaches to count the frequencies of array elements in JavaScript.Using an Object (Simple and Efficient)This is the most common approach for countin...read more

Length after removing Invalid K-Length Substrings

Last Updated: 07 November 2023

Given a string 'S' of length N which consists of both Uppercase and Lowercase English alphabets and a positive integer K (1 = K = N), the task is to return the length of t...read more

Geeks Premier League 2023

Minimum size of subset od String with frequency more than half of Array

Last Updated: 12 May 2024

Given an Array of Strings (Arr), the task is to find the smallest subset of strings in the array such that the total count of those selected strings exceeds 50% of the siz...read more

Lexicographically Largest Substring having each Characters even times

Last Updated: 12 December 2023

Given a string S of length N (1 ≤ N ≤ 105) that consists of lowercase English letters. The task is to find a substring such that rearranging the characters within a substr...read more

Geeks Premier League 2023

Check if it is possible to make all strings of A[] equal to B[] using given operations

Last Updated: 11 January 2024

Consider two arrays, A[] and B[], each containing N strings. These strings are composed solely of digits ranging from 0 to 9. Then your task is to output YES or NO, by fol...read more

Geeks Premier League 2023

Find the minimum difference of 1s between two vertical halves of the given matrix

Last Updated: 15 February 2024

Given a binary square matrix M[][] of size NXN, where N is an even number. The task is to find the minimum difference of frequency of 1s between the first and the second v...read more

Geeks Premier League 2023

Transform Strings by Frequency Exchange and Swapping

Last Updated: 29 February 2024

Given two strings s1 and s2, the task is to check if they can be transformed into each other by performing the following operation any number of times on any string.Choosi...read more

Geeks Premier League 2023

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