Check whether frequency of characters in a string makes Fibonacci Sequence
Given a string with lowercase English alphabets. The task is to check whether the frequency of the characters in the string can be arranged as… Read More »
Tag Archives: frequency-counting
Count numbers in range such that digits in it and it’s product with q are unequal
Given a range of numbers [l, r] and an integer . The task is to count all such number in the given range such that… Read More »
String with frequency of characters in Lucas Sequence
Given a string ‘str’ containing lowercase English alphabets, the task is to find whether the frequencies of the characters of the string are in Lucas… Read More »
Array elements with prime frequencies
Given a string. The task is to find the count of characters whose number of occurrences is prime. Examples: Input : str = “geeksforgeeks” Output… Read More »
Remove elements from the array whose frequency lies in the range [l, r]
Given an array of integers, remove the elements from the array whose frequency lies in the range [l, r]. Examples: Input : arr[] = {… Read More »
Find array elements with frequencies in range [l , r]
Given an array of integers, find the elements from the array whose frequency lies in the range [l, r]. Examples: Input : arr[] = {… Read More »
Maximizing the elements with a[i+1] > a[i]
Given an array of N integers, rearrange the array elements such that the next array element is greater than the previous element ( > ).… Read More »
Replace every elements in the array by its frequency in the array
Given an array of integers, replace every element by its frequency in the array. Examples: Input : arr[] = { 1, 2, 5, 2, 2,… Read More »
Remove elements from the array which appear more than k times
Given an array of integers, remove all the occurrences of those elements which appear strictly more than k times in the array. Examples: Input :… Read More »
Find the smallest after deleting given elements
Given an array of integers, find the smallest number after deleting given elements. In case of repeating elements, we delete one instance (from the original… Read More »
Remove characters that appear more than k times
Given a string of lowercase letters, reduce it by removing the characters which appears more than k times in the string. Examples: Input : str… Read More »
Remove characters from string that appears strictly less than K times
Given a string of lowercase letters and a number K. The task is to reduce it by removing the characters which appears strictly less than… Read More »
Lexicographically largest string formed from the characters in range L and R
Given a string S and a range L and R, the task is to print the lexicographically largest string that can be formed from the… Read More »
Program to check if all characters have even frequency
Given a string S consisting only of lowercase letters check if the string has all characters appearing even times. Examples: Input : abaccaba Output :… Read More »
Count minimum frequency elements in a linked list
Given a linked list containing duplicate elements. The task is to find the count of all minimum occurring elements in the given linked list. That… Read More »