frequency-counting Archives

Count the number of unique characters in a given String

Last Updated: 19 April 2023

Given a string, str consisting of lowercase English alphabets, the task is to find the number of unique characters present in the string.Exa ...read more

Strings

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frequency-counting

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Algo-Geek 2021

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Calculate the frequency of each word in the given string

Last Updated: 02 March 2023

Given a string str, the task is to find the frequency of each word in a string.Examples:Input: str = "Geeks For Geeks"Output:For 1Geeks 2Exp ...read more

Count common characters in two strings

Last Updated: 25 November 2021

Given two strings s1 and s2 consisting of lowercase English alphabets, the task is to count all the pairs of indices (i, j) from the given s ...read more

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Count Triplets such that one of the numbers can be written as sum of the other two

Last Updated: 05 February 2024

Given an array A[] of N integers. The task is to find the number of triples (i, j, k) , where i, j, k are indices and (1 = i j k = N), suc ...read more

Count Occurrences of Anagrams

Last Updated: 17 March 2025

Given a word pattern and a string text consisting of lowercase characters, the task is to return the count of substrings in text which are a ...read more

Printing frequency of each character just after its consecutive occurrences

Last Updated: 19 March 2024

Given a string in such a way that every character occurs in a repeated manner. Your task is to print the string by inserting the frequency o ...read more

Sorting

frequency-counting

DSA

Check if two strings are permutation of each other

Last Updated: 19 May 2023

Write a function to check whether two given strings are Permutation of each other or not. A Permutation of a string is another string that c ...read more

Counting the Frequencies in a List Using Dictionary in Python

Last Updated: 10 February 2025

Counting the frequencies of items in a list using a dictionary in Python can be done in several ways. For beginners, manually using a basic ...read more

Python dictionary-programs

Find frequency of each word in a string in Python

Last Updated: 20 February 2023

Write a python code to find the frequency of each word in a given string. Examples:Input : str[] = "Apple Mango Orange Mango Guava Guava Ma ...read more

Count occurrences of elements of list in Java

Last Updated: 31 May 2022

Suppose we have an elements in ArrayList, we can count the occurrences of elements present in a number of ways.HashMapThis data structure us ...read more

Find one extra character in a string

Last Updated: 19 April 2023

Given two strings which are of lengths n and n+1. The second string contains all the characters of the first string, but there is one extra ...read more

Check if two strings have a common substring

Last Updated: 27 January 2023

You are given two strings str1 and str2. You have to check if the two strings share a common substring.Examples :Input : str1 = "HELLO" ...read more

Frequency of a Substring in a String

Last Updated: 18 April 2023

Given an input string and a pattern, the task is to find the frequency of occurrences of the string pattern in a given string.Examples:Input ...read more

Program to sort string in descending order

Last Updated: 01 November 2022

Given a string, sort it in descending order.Examples:Input : alkasinghOutput : snlkihgaa Input : nupursinghOutput : uusrpnnihg Input : geeks ...read more

Remove duplicates from a string

Last Updated: 11 September 2024

Given a string s which may contain lowercase and uppercase characters. The task is to remove all duplicate characters from the string and fi ...read more

Strings

frequency-counting

DSA