How 12306 Ticket‑Booking Uses Bitmap & Bitwise Operations to Prevent Overbooking

This article explains the 12306 train ticket reservation algorithm, showing how bitmaps combined with bitwise OR operations can model seat availability across multiple stations, using a simplified example of four seats and three segments to illustrate ticket allocation, conflict detection, and remaining‑ticket calculation.

12306Bitmapbitwise operations

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How 12306 Ticket‑Booking Uses Bitmap & Bitwise Operations to Prevent Overbooking