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Given user-page visit records, produce for each page a ranked list of recommended pages based on co-visitation patterns (pages users who visited A also visited). The task centers on computing co-occurrence counts or similarity between pages at scale and returning the top-k recommendations per page (use hash maps/graphs for counts and sorting or heaps for top-k).
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Leetcode 1264. Page Recommendations
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Source snapshot: Nov 12, 2026
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