In this problem, we are given an integer N, denoting a series of numbers consisting of 4 and 7 only.The series is 4, 7, 44, 47, 74, 77, …The task is to find the n-th element in a series with only 2 digits (and 7) allowed.Let’s take an example to ... Read More

In this problem, we are given three values A, B and N. Our task is to Find n positive integers that satisfy the given equations.Problem Description − We need to find the N positive values that satisfy both the equations, x12 + x22 + … xn2 ≥ A x1 + ... Read More

In this problem, we are given a string num representing a large integer. Our task is to Find N % (Remainder with 4) for a large value of N.Problem Description − we will be finding the remainder of the number with 4.Let’s take an example to understand the problem, Inputnum ... Read More

In this problem, we are given a number N. Our task is to Find Multiples of 2 or 3 or 5 less than or equal to N.Problem Description − We will be counting all elements from 1 to N that are divisible by 2 or 3 or 5.Let’s take an ... Read More

In this problem, we are given a singly linked list LL and a number k. Our task is to Find modular node in a linked list.Problem Description − we need to find the last node of the linked list for which the index is divisible by k i.e. i % ... Read More

In this problem, we are given an array arr[] of size n and the start and end element denoting the range. Our task is to Find missing elements of a range.Problem Description − we will be finding the elements of the range that are not present in the range.Let’s take ... Read More

In this problem, we are given a binary tree. Our task is to Find mirror of a given node in the Binary tree. We will be given a node, and find the mirror image of that node in the opposite subtree.Let’s take an example to understand the problem, InputOutputmirror of ... Read More

In this problem, we are given a point P in a 2-D plane and the points a, b, c of the equation ax + by + c = 0. Our task is to find a mirror image of a point in 2-D plane.Let’s take an example to understand the problem, ... Read More

In this problem, we are given an array arr[] consisting of n elements and an integer h. Each element of the array arr[] contains the number of pending jobs for the person and H is the time left to complete the jobs (in Hours). Our task is to Find minimum ... Read More

In this problem, we are given an array of n numbers and an integer value k. Our task is to Find minimum possible size of the array with given rules for removing elements.Problem Description − we need to minimise the number of elements in the array. By using the follow ... Read More