Leetcode 1396. Design Underground System
Design a system that records passenger check-ins and check-outs and returns the average direct travel time between two stations. The core challenge is maintaining active check-ins per passenger id and aggregated travel-time statistics (sum and count) per station-pair to answer getAverageTime queries efficiently.
Asked at:
Axon
Apple
Bloomberg
Ramp
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Late June, 2026
Bloomberg
Senior
Mid June, 2026
Bloomberg
Senior
Early June, 2026
Apple
Senior
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