Maximum Subsequence Score

Category

Heap / Priority Queue

Checkbox

Difficulty

Medium

Index

Key Ideas

The key idea to solve the problem in LeetCode-75 curated list is to use the two-pointer technique to maintain a sliding window and keep track of the maximum subsequence score.

Problem Number

2542

Problem Summary

The problem number 2542 in the LeetCode-75 curated list is called "Maximum Subsequence Score." It is a medium difficulty problem in the category of Heap / Priority Queue. The problem involves finding the maximum score of a subsequence given an array with positive and negative integers. A key pitfall to watch out for is handling cases where the array contains only negative numbers or all elements are zero.

Solution Summary

The best solution to solve this problem is to use a two-pointer approach. We start with two pointers, left and right, both initially pointing to the first element of the array. Then, we move the right pointer to the next element while keeping track of the maximum subsequence score. If the score exceeds the maximum, we update the maximum. If the score becomes negative, we reset it to zero and move the left pointer to the next element. We repeat this process until the right pointer reaches the end of the array. The time complexity of this solution is O(n), where n is the length of the array.