Suppose we have two numbers a and b, we have to find an array containing values in range [1, a] and requires exactly b number of calls of recursive merge sort function.So, if the input is like a = 10, b = 15, then the output will be [3, 1, ... Read More

Suppose we have an array of numbers; we have to find a number B which is the divisor of all except for exactly one element in the given array. We have to keep in mind that the GCD of all the elements is not 1.So, if the input is like ... Read More

Suppose we have an array of size N; we have to find an element which divides the array into two different sub-arrays with equal product. Return -1 if no such partition is possible.So, if the input is like [2, 5, 3, 2, 5], then the output will be 3 then ... Read More

Suppose we have an array of positive numbers; we have to check a point/item up to which items create a strictly decreasing sequence first followed by a sequence of strictly increasing integers. These are the following properties: We have to keep in mind that the sequences must be of minimum ... Read More

Suppose we have an array of words, we have to find any alphabetical order in the English alphabet so that the given words can be considered sorted in ascending order, if there is any such order exists, otherwise return "impossible".So, if the input is like words = ["efgh", "wxyz"], then ... Read More

Suppose we have a character mapping as follows, here each digit, from 1 to 9, maps to few characters.1 -> ['A', 'B', 'C'] 2 -> ['D', 'E', 'F'] 3 -> ['G', 'H', 'I'] 4 -> ['J', 'K', 'L'] 5 -> ['M', 'N', 'O'] 6 -> ['P', 'Q', 'R'] 7 -> ... Read More

Suppose we have a binary 2D matrix, now we have to find the beginning point and terminating point of all rectangles filled with 0s. We have to keep in mind that rectangles are separated and do not touch each other however they can touch the array boundary. A rectangle with ... Read More

Suppose we have one undirected graph and a set of vertices; we have to find all reachable nodes from every vertex present in the given set.So, if the input is likethen the output will be [1, 2, 3] and [4, 5] as these are two connected components.To solve this, we ... Read More

Suppose we have a string; we have to find all the palindromic sub-strings from that string. Here aa and aa are considered as two sub-strings, not one.So, if the input is like redivider, then the output will be ['r', 'e', 'd', 'i', 'v', 'ivi', 'divid', 'edivide', 'redivider', 'i', 'd', 'e', ... Read More

Suppose we have an array A of numbers, we have to find all indices of this array so that after deleting the ith element from the array, the array will be a good array. We have to keep in mind that −Good array is an array with an element that ... Read More