In the world of algorithm design and problem-solving, the two-pointer technique stands out as a powerful and widely utilized strategy. With its application extending to arrays, linked lists, and strings, this approach has proven its efficacy in reducing time complexity and, in certain cases...
In this approach, we traverse the linked list using two pointers. One pointer is incremented by one while the other is incremented by two. When the fast pointer reaches the end, the slow pointer will be at the middle of the linked list. The time complexity of this solution is O(n...
How sorted array work? In a sorted array, if you want to find a pair satisfying some condition you can use this approach as at each step we know how to update the pointers. For better understanding, let's take an example. Suppose we have an array 'arr' and we want to find a pair...
Let us do discuss the working of two pointer algorithm in brief which is as follows. The algorithm basically uses the fact that the input array is sorted. We start the sum of extreme values (smallest and largest) and conditionally move both pointers. We move left pointer ‘i’ when the ...
Since the idea is clear now, we can jump to the implementation of this approach. 4.2. Implementation Take a look at the implementation of the two-pointers approach: algorithm twoPointersMerge(A, B): // INPUT // A = The first array ...
The algorithm combines the merits of a greedy search and meta-heuristic techniques by using only three collaborative potential solutions and three concurrent operations. Experimental results show that the proposed approach is able to perform a rapid subassembly detection and sequence optimisation for a ...
Using sorting/two pointers technique gives us a O(n*logn) time, and O(1) space(if quick sort is used) algorithm. This problem is different with the Two Sum problem in the following two aspects. 1. We need to design a data structure that supports adding new element to the internal ...
Therefore, if we chooseiandjsuch thati + j = k - 1, we are able to find the k-th smallest element. This is an important invariant that we must maintain for the correctness of this algorithm. Summarizing the above, Maintaining the invariant ...
ListNode newNode = null; // carry to hold value if sum > 10 int carry = 0; // 2 pointers as we mentioned in the algorithm while (currentNodeList1 != null || currentNodeList2 != null) { // next iteration might bring a carry with it, which we need to be added into the sum. ...
Using Pointers Method 1: Naive Approach (using loops) In this approach, we will compare the two strings using loops. advertisement Algorithm to compare two strings using loops: Step 1: Start the Program. Step 2: Input both the Strings. ...