<ul data-eligibleForWebStory="true"><li>The problem involves finding a subsequence of length k from an integer array nums with the largest sum.</li><li>The solution entails selecting the k largest elements in the array while maintaining their original order.</li><li>The algorithm includes creating pairs of index and value, sorting by value, selecting top k elements, sorting by index, and extracting values.</li><li>The time complexity is O(n log n) due to sorting operations, and space complexity is O(n) for storing pairs.</li></ul>

2099. Find Subsequence of Length K With the Largest Sum

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