# Tag Archives: Set

## Array Nesting

Question: Given a zero-indexed array ‘A’ of length ‘N’ which contains all integers from 0 to N-1. Find and return the longest length of set S, where S[i] = {A[i], A[A[i]], A[A[A[i]]], …} subjected to a particular condition. Suppose the first element in S starts with the selection of element A[i] of index = i, the next element… Read More »

## Length of longest palindrome that can be built from a string

Question: Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. Input: “abccccdd” Output: 7 In the above example, the longest palindrome in the given string is “dccaccd” whose length is 7. A palindrome consists of letters with equal partners, plus possibly a unique… Read More »

## Prime factors of a number. [Prime Factorization]

Question: Given an integer N, find all the prime factors of the number. Input: N = 45 Output: 3 5 Finding prime factors of any numbers is a very important concept in number theory. One sample problem is available here in which we have to find the largest prime factor. The mathematical concept behind this problem is simple.… Read More »

## Determine if two strings share a common sub-string.

Question: Given two strings, determine if they share a common sub-string. If they have a common sub-string, print YES else print NO. Input: studyalgorithms algos Output: YES This is one of the easy problems but can get a little tricky, if we do not understand it completely. Let us try to understand the test case String 1 =… Read More »