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Leetcode Weekly Contest 504 | @ss performance like usual
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1,230 views41likes2:23:10PudeeshtOriginal Release: 2026-05-31

This problem asks to maximize the total number of item copies (both purchased and free) given a budget, where purchasing item I gives one free copy of every item J where factor I divides factor J. The solution involves dynamic programming where we track the current item index and remaining budget, considering two choices for each item: skip it or buy it (possibly multiple copies). The key insight is that buying multiple copies of the same item doesn't provide additional free copies through that item, but the same item J can be received multiple times for free from purchases of different items. The DP state transition considers both skipping the current item and buying it with the remaining budget, returning the maximum copies obtainable.

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