## Replace two substrings (of a string) with each other

Given 3 strings S, A and B. The task is to replace every sub-string of S equal to A with B and every sub-string of… Read More »

## Count occurrences of a string that can be constructed from another given string

Given two strings str1 and str2 where str1 being the parent string. The task is to find out the number of string as str2 that… Read More »

## Check if a binary string has two consecutive occurrences of one everywhere

Given a string str consisting of only characters ‘a’ and ‘b’, the task is to check whether the string is valid or not. In a… Read More »

## Count strings that end with the given pattern

Given a pattern pat and a string array sArr[], the task is to count the number of strings from the array that ends with the… Read More »

## Length of the longest substring with consecutive characters

Given a string str of lowercase alphabets, the task is to find the length of the longest sub-string of characters in alphabetical order i.e. string… Read More »

## Check if a string can be repeated to make another string

Given two strings a and b, the task is to check how many times the string a can be repeated to generate the string b.… Read More »

## Print n 0s and m 1s such that no two 0s and no three 1s are together

Given two integers n and m where n is the number of 0s and m is the number of 1s. The task is to print… Read More »

## Weighted sum of the characters of a string in an array | Set 2

You are given an array of strings str[], the task is to find the score of a given string s from the array. The score… Read More »

## Count occurrences of a sub-string with one variable character

Given two strings a and b, and an integer k which is the index in b at which the character can be changed to any… Read More »

## Generate permutation of 1 to N such that absolute difference of consecutive numbers give K distinct integers

Given two integers N and K where K < N, the task is to generate a permutation of integers from 1 to N such that… Read More »

## Check if a word exists in a grid or not

Given a 2D grid of characters and a word, the task is to check if that word exists in the grid or not. A word… Read More »

## Occurrences of a pattern in binary representation of a number

Given a string pat and an integer N, the task is to find the number of occurrences of the pattern pat in binary representation of… Read More »

## Minimum number of consecutive sequences that can be formed in an array

Given an array of integers. The task is to find the minimum number of consecutive sequences that can be formed using the elements of the… Read More »

## Sum of integers upto N with given unit digit (Set 2)

Given two integer N and D where 1 ≤ N ≤ 1018, the task is to find the sum of all the integers from 1… Read More »

## Count of lines required to write the given String

Given a string str and an integer array width[] where: width[0] = width of character ‘a’ width[1] = width of character ‘b’ … width[25] =… Read More »