Length of the largest subarray with contiguous elements

The problem “Length of the largest subarray with contiguous elements” states that you are given an integer array. The problem statement asks to find out the length of the longest contiguous sub-array of which elements can be arranged in a sequence (continuous, either ascending or descending). The numbers in the …

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Maximum difference between first and last indexes of an element in array

Suppose, you have an array of integers. The problem “Maximum difference between first and last indexes of an element in array” asks to find out the difference between the first and last index of each number present in an array such that the difference is being maximum of all. Example …

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k-th missing element in increasing sequence which is not present in a given sequence

The problem “k-th missing element in increasing sequence which is not present in a given sequence” states that you are given two arrays. One of them is arranged in ascending order and another normal unsorted array with number k. Find the kth missing element which is not present in normal …

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Path with maximum average value

Problem Statement The problem “Path with maximum average value” states that you are given a 2D array or a matrix of integers. Now consider you are standing at the top-left cell and need to reach the bottom right. For reaching the destination, you need to move along either in the …

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Longest Substring Without Repeating Characters

Given a string, we have to find the length of the longest substring without repeating characters. Let’s look into a few examples: Example pwwkew 3 Explanation: Answer is “wke” with length 3 aav 2 Explanation: Answer is “av” with length 2 Approach-1 for Longest Substring Without Repeating Characters  Brute Force  …

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Products of ranges in an array

Problem Statement The problem “Products of ranges in an array” states that you are given an integer array consisting of numbers range from 1 to n and q number of queries. Each query contains the range. The problem statement asks to find out the product within the given range under …

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Sort an array according to the order defined by another array

Problem Statement You are given two arrays of integers arr1[] and arr2[]. The problem “Sort an array according to the order defined by another array” asks to sort the first array according to the second array so that the numbers in first array will be relatively sorted off all the …

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Maximize sum of consecutive differences in a circular array

Problem Statement Suppose you have an integer array. This array should be treated as a circular array. The last value of an array will be connected to the first array, an ⇒ a1. The problem “Maximize sum of consecutive differences in a circular array” asks to find out the maximum …

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Maximum length subsequence with difference between adjacent elements as either 0 or 1

Problem Statement You are given an integer array. The problem “Maximum length subsequence with difference between adjacent elements as either 0 or 1” asks to find out the maximum subsequence length with the difference between the adjacent elements should be none other than 0 or 1. Example arr[] = {1, …

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