dsa3 min read
Design Twitter
Design a simplified Twitter with follow/unfollow and a news feed showing the 10 most recent tweets from followed users.
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All Posts
1575 articles
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Ugly Number III
Find the nth number divisible by a, b, or c using binary search with inclusion-exclusion counting formula.
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Maximum Performance of a Team
Maximize team performance (sum of speeds * min efficiency) by sorting by efficiency and using a min-heap on speeds.
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Longest Happy String
Build the longest string with at most 2 consecutive identical characters by always using the most frequent available character.
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Maximum Frequency Stack
Design a stack that pops the most frequent element, breaking ties by most recently pushed, using frequency-bucket stacks.
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