Union and Intersection of two Linked Lists

Given two linked lists, create another two linked lists to get union and intersection of the elements of existing lists. Example Input: List1: 5 → 9 → 10 → 12 → 14 List2: 3 → 5 → 9 → 14 → 21 Output: Intersection_list: 14 → 9 → 5 Union_list:   …

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Maximum difference between frequency of two elements such that element having greater frequency is also greater

Suppose, you have an integer array. The problem statement asks to find out the maximum difference between the frequency of any two distinct elements of a given array, but the element with the greater frequency should also be greater in value than the other integer. Example Input: arr[] = {2,4,4,4,3,2} …

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Move all Negative Numbers to Beginning and Positive to End with Constant Extra Space

Suppose you have an array of integers. It consists of both negative and positive numbers and the problem statement asks to shift/move all the negative and positive elements to the left of the array and to the right of the array respectively without using extra space. Example  Input: arr[]={2,4,-10,13,-7,-60,52,8,-19 } …

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