These are a series by Felix Halim, and great material if you are trying to get into competitive programming. They are in great shape.
Pickup location:
Weekdays: Finchley Road Station after 7pm, or Liverpool Station during the day.
Weekends: Finchley Road Station.
Fair Chance Policy: I’ll wait before choosing a recipient to give more people a chance to reply.
Competitive Programming Books (Finchley Road Station NW3)
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