Practice problems

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Problems

2711159

Two Sum

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0:001:002:003:004:005:00

Meeting Rooms

IntervalsGreedyHeap / Priority Queue
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HTML document:<div><p>content</p></div>✓ Valid nesting

HTML Tag Validator

Stack
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pwwkewunique window

Analytics: Longest Unique Session Window

Sliding WindowArrays & Hashing
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Error dashboard:454041205008950330200🚨⚠️Top 2 critical alerts

Telemetry: Top K Frequent Error Codes

Heap / Priority QueueArrays & Hashing
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Response times (ms)120450230890340P9595th percentile: 890ms

Monitoring: kth Largest Metric

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Your cart:📚🎧💻☕"Customers also bought" scores128624

Amazon: Cross-Sell Recommendations

Arrays & HashingMath & Geometry
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